Really, it's just what we make it. He shot up a building full of people, and then decided to implicate his entire community in those murders; I'd say he is a loser, and judging by his manifesto, he might have accomplices that share his views, but this man is clearly lonely as fuck, and has loaded all those frustrations into a white identity, that when threatened, he decided to "protect" - qoutation marks not because the people he shot were the explicit invaders , but because he wanted to be the protector in OUR eyes, we being his community.
Secondly, yeah his views are coherent, but why haven't none of us shot up a mosque? Because we're not clinically dense, and because it's a place of worship filled with random people. Why does he do it? Because he supports the same cause as us, but not because of reasoning and logic so to speak, but because of emotions.
I don't think his behavior is that of some warrior/savior/protector-type mentality, there's definitely personal motivation behind, because he wanted to be percieved a certain way in his community. Honestly, what the fuck does this help? Did he not have the balls to try and find someone more radical, maybe like a gang of middle easterners? No, he goes for the real easy kills, does it on a random Friday so that it's filled with ordinary people, and children and women, instead of doing it literally any other time, where it might be mostly men, and spews so many memes, you could write a book; that's definitely pick-me-ass behavior.