They did not discriminate in who they hated
In San Diego, two teenagers who had found each other in the darkest corridors of the internet walked into a mosque on a Monday morning and killed three people, leaving behind a manifesto that stitched together nearly every form of contemporary hate into a single nihilistic creed. Their attack was modeled on a mass killing half a world away, livestreamed for an audience that had helped shape them, and carried out two hours after one shooter's own mother called 911 in fear. The tragedy asks an old and unanswered question in a new and urgent form: how does a society recognize the moment a young person crosses from consuming hatred to enacting it?
- Two teenagers armed with weapons taken from a family home opened fire at a San Diego mosque, killing three people including a security guard whose final act was triggering a lockdown that likely saved over 100 children inside.
- The attackers left behind a 75-page manifesto fusing antisemitism, white supremacist accelerationism, and incel ideology — a document the FBI describes as emblematic of a rising category called 'nihilistic violent extremism.'
- The attack was livestreamed in deliberate imitation of the 2019 Christchurch massacre, with the shooters identifying themselves as ideological 'sons' of that killer and wearing Nazi insignia as they moved through the building.
- A critical warning window was missed: one shooter's mother called 911 two hours before the attack, reporting missing weapons and a son she feared was suicidal, but without a known target, law enforcement could not intercept in time.
- The case has intensified scrutiny on online 'True Crime' communities where extreme violence is documented and celebrated, and where these two teenagers first found each other, forged a shared ideology, and planned their attack.
On a Monday morning in San Diego, two teenagers entered the Islamic Center armed with weapons and a worldview built from the internet's most extreme spaces. By the time it ended, three people were dead. The attackers left behind a 75-page manifesto combining antisemitic conspiracy theories, white supremacist accelerationism, and incel rhetoric — a document expressing contempt for nearly every group imaginable. "These subjects did not discriminate in who they hated," the FBI's special agent in charge said the following day.
Cain Clark, 17, and Caleb Vazquez, 18, had met online, discovered they shared a city, and eventually met in person around a shared appetite for violence. Both identified with the incel movement. Their manifesto opened with obsessive antisemitic language before pivoting to calls for a race war. They modeled themselves explicitly on the 2019 Christchurch shooter, calling themselves his ideological "sons," wearing gear bearing Nazi insignia, and livestreaming the attack — a tactic borrowed directly from that massacre — to a website known for hosting extreme violence.
The warning signs arrived too late to matter. Around 9:40 a.m., Clark's mother called 911 to report missing weapons, a missing vehicle, and a son in camouflage whom she feared was suicidal. A threat alert went out, but with no specific target identified, the response stayed general. Two hours later, the shooting began.
The security guard outside, Amin Abdullah, was killed — but not before activating a lockdown that moved more than 100 children in the facility's school to safety. The attackers moved through the building, then exited to pursue two men in the parking lot, killing them before fleeing in their vehicle. A few blocks away, Clark shot Vazquez, then himself.
Investigators are now focused on the online pipeline that brought these two together — particularly communities where extreme violence is documented and celebrated. The FBI has named the broader pattern "nihilistic violent extremism," a category that fuses multiple hate ideologies into one. The harder question, still unanswered, is how to identify the moment a young person moves from consuming that world to acting inside it.
On Monday morning in San Diego, two teenagers walked into the Islamic Center carrying weapons and a worldview assembled from the darkest corners of the internet. By the time it was over, three people were dead, and the attackers had left behind a 75-page document that reads like a greatest hits of contemporary hate ideology—antisemitic conspiracy theories, white supremacist accelerationism, misogynistic incel rhetoric, and blanket contempt for Muslims, Hispanics, Black people, and LGBTQ+ individuals. "These subjects did not discriminate in who they hated," Mark Remily, the FBI's special agent in charge in San Diego, said at a press conference the day after.
The two gunmen were Cain Clark, 17, and Caleb Vazquez, 18. They had met online, discovered they lived in the same city, and connected in person around a shared vision of violence. Clark had wrestled in high school. Both identified with the incel movement—men who believe they are entitled to sex and blame women for their isolation. The manifesto they left behind, which CBS News reviewed, opens with the phrase "IT'S THE JEWS" repeated obsessively, then pivots to calls for a "race war" and references to accelerationism, a violent white supremacist ideology centered on hastening the collapse of society. The document appears to be a compilation of material circulating online for years, possibly assembled with AI assistance, though CBS News could not independently verify its origins.
The attackers modeled themselves explicitly on the 2019 Christchurch mosque shooting that killed 51 people. They called themselves the "sons" of that shooter, according to Oren Segal, senior vice president of Counter-Extremism and Intelligence at the Anti-Defamation League. They wore gear bearing Nazi symbols resembling SS insignias and etched "Race War" onto one of their handguns. They livestreamed the attack—a tactic borrowed directly from Christchurch—and posted the footage to a website known for hosting extreme violence content, where it circulated widely.
The warning signs existed but were not acted upon in time. At around 9:40 a.m., Clark's mother called 911. She had discovered that multiple weapons and her vehicle were missing. Her son was wearing camouflage and, she feared, was suicidal. The call triggered a threat alert to local law enforcement, but without a specific target identified, the response remained general. Two hours later, the two teens opened fire at the mosque.
They killed a security guard stationed outside. Inside, the facility housed a school with more than 100 children. The attackers began moving door to door, but the guard, Amin Abdullah, had already activated a lockdown alert, moving the students to safety in another part of the building. Through a window, the teens spotted two men in the parking lot. They exited the mosque to pursue and kill them, then fled in their vehicle, firing from the windows as they drove. A few blocks away, Clark shot Vazquez, then turned the gun on himself.
The case reflects what the FBI now identifies as a growing category of violence: "nihilistic violent extremism," a broad ideology that stitches together multiple forms of hate into a single worldview. The attackers had stockpiled 30 guns and a crossbow, all taken from Clark's parents' home. A suicide note found on Clark indicated he was willing to die for his cause. Vazquez's family, in a statement released days later, said they stood firmly against the ideology and actions that led to the tragedy, that these acts did not reflect their family's values.
Investigators are now examining the role of online communities in radicalizing young people—particularly what's known as the "True Crime Community," spaces where extreme violence is documented, discussed, and, in some cases, celebrated. The two teenagers had found each other in these spaces, recognized a shared hatred, and moved from the digital world to the physical one. The question now facing law enforcement and researchers is how to identify and interrupt that pipeline before the next pair of teenagers decides to act.
Citações Notáveis
These subjects did not discriminate in who they hated— Mark Remily, FBI Special Agent in Charge, San Diego Field Office
We stand firmly against the ideology and actions that led to this tragedy. These actions do not reflect the values we raised our family with or the beliefs we hold in our hearts.— Vazquez's family, in a statement
A Conversa do Hearth Outra perspectiva sobre a história
What strikes you most about the manifesto they left behind?
That it's not original. It's a collage—75 pages of ideas that have been circulating online for years. They didn't invent this hatred; they assembled it. That's almost more unsettling than if it were the product of one person's twisted thinking.
Why did they livestream it?
Because they wanted to be seen. They wanted to claim a legacy. By broadcasting it the way the Christchurch shooter did, they were saying: we are part of a lineage. We are the next chapter. The internet made them feel less alone in their extremism, and it also gave them a stage.
The mother called 911 two hours before. What happened in those two hours?
That's the gap no one can close now. She reported missing weapons, a missing vehicle, her son in camouflage. But without a specific target, without a clear threat to a named place, the system couldn't act fast enough. By the time anyone could have intervened, they were already at the mosque.
Why did they spare the children?
They didn't spare them by choice. The security guard locked down the school before the attackers could reach those rooms. If he hadn't acted that quickly, the death toll would have been incomprehensibly higher. That's the only mercy in this story, and it came from one man's presence of mind.
What does "nihilistic violent extremism" mean, exactly?
It means they didn't have a coherent political program. They weren't trying to build something or change policy. They wanted to destroy—society, order, meaning itself. They hated Jews and Muslims and women and Hispanics and trans people and Black people. The hatred wasn't focused; it was total. That's what makes it harder to predict and harder to stop.
Do you think they would have acted alone, or did meeting each other make the difference?
That's impossible to know. But the internet let them find each other across a city and confirm that their darkest thoughts were shared, were validated, were part of a movement. Alone, one of them might have remained a disturbed teenager. Together, they became actors in a narrative they'd inherited from Christchurch.