If you can't see how he hosting Shapiro and Musk, using right wing memes and rethoric, endorsing a fascist author, and allowing Nazis and other right-wingers to fester in his community is directly related with why that POS shooter mentioned him, that is precisely the problem.
That's a common excuse used to defend the guy over and over again like it is just some isolated incident and not connected to the content he produces and the community he fosters.