Hours before the shooting on Saturday at the Chabad of Poway synagogue outside San Diego, an 8chan user identifying himself by the same name as the suspect in the attack posted a link to a white nationalist manifesto on that far-right message board.

“What I’ve learned here is priceless,” the user wrote, adding, "a livestream will begin shortly."

Saturday’s message is strikingly similar to the 8chan post left by the man accused of shooting up mosques in New Zealand before he killed 50 worshipers in March. Both included detailed manifestoes and links to Facebook pages.

As in New Zealand, the suspected Poway shooter appeared eager to win approval for his act of violence. In his post, the synagogue shooter cites the 8chan message board for indoctrinating him, urging others to take similar action. His manifesto not only refers to the online postings of the New Zealand shooting and of the man who killed 11 people at a Pittsburgh synagogue in October, but seems almost cribbed from past white nationalist rants.

The pattern is eerie: it starts with a crude genealogy of the shooter’s ethnic roots, then a self-aggrandizing Q. and A. with himself, followed by a litany of toxic in-jokes meant to confuse the media and those less savvy in far-right online culture. (Like the New Zealand shooter, the Poway shooter facetiously mentioned the YouTube star PewDiePie as an influence.)