You did link to the part of his ramblings where he says he's glad conservatism is dead, didn't you?
"Elsewhere, the shooter disparages conservatism and declines to identify with it, writing that “conservatism is dead, thank god,” and calling it “corporatism in disguise.” Conservatives, he says, “don’t even believe in the race, they don’t have the gall to say race exists” and “don’t even care if it does.”"
You linked to the part where he calls for repeal of the 2nd Amendment, right?
"Elsewhere in the manifesto, the shooter predicts that his attack will lead to “calls for the removal of gun rights from whites in the United States… that is the plan all along.”"
https://www.breitbart.com/ccnational-security/2019/03/15/new-zealand-shooter-hopes-for-u-s-civil-war-conservatism-is-dead-thank-god/
The shooter is both for and against all political ideologies. His manifesto is a classic example of schizophrenia.