No, it’s another meme reference, https://knowyourmeme.com/memes/navy-seal-copypasta
much of his “manifesto” is referring memes and in-jokes from the alt-right Internet. Even the format is an ironic reference to Anders Breiviks 1500 page ode to schizophrenia. He’s showing off to those involved in the alt-right and laughing at those who don’t know about how modern western racial supremacy groups work.