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Alleged Shooters of San Diego Mosque Left Behind a Shocking Manifesto

Articles | May 19, 2026 | by Catholics for Catholics

Sources told The California Post that 17-year-old Cain Clark and 19-year-old Caleb Vasquez wrote the anarchic manifesto before killing three people and then each other, according to law enforcement sources.

By Catholics for Catholics

The two teenagers who allegedly perpetrated the attack on a San Diego mosque apparently left behind a scathing manifesto which praised Adolf Hitler and other mass murderers, according to a story by the California Post.

Investigators are probing whether 17-year-old Cain Clark and 19-year-old Caleb Vasquez wrote the anarchic manifesto before killing three people and then each other, according to law enforcement sources.

The manifesto allegedly espouses a dark desire to spark a race war and bring about the end of the civilized world.

Authorities say that Clark and Vazquez hero-worshipped the New Zealand shooter Brenton Tarrant and named their manifesto after him.

Clark and Vazquez gunned down three people on Monday, including security guard and father of eight Amin Abdullah, who police say prevented more deaths. An online fundraiser for the slain hero raised nearly $2 million in less than 24 hours.

The Post reported that the 75-page document is loaded with the same Nazi iconography that Clark was seen donning during a horrifying livestream video of the attack, including the Black Sun, which is associated with Nazi SS head Heinrich Himmler, and Atomwaffen, which is tied to a violent neo-Nazi group.

Some of the opinions exposed in the manifesto contain an irrational compendium of anti-Trump, anti-liberal, antisemitic, homophobic and misogynist bile — tied together only by the authors’ fury that they were not given more in life.

The sources said detectives have a copy of the purported manifesto and believe it to be authentic.

The next-door neighbor of Clark in San Diego described his family as normal, adding that the teen was into martial arts and remembered seeing him in a Gi, a karate uniform.

“As far as we knew he was very nice. They were a nice family,” said the neighbor, Marne, 85, who declined to provide her last name.

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