It's so pervasive there are people who describe themselves as anarchists and zionists as if those things are possibly compatible. And there are a lot of them especially online.
I think for the most part it's just "my side and its allies good, their collective enemies bad", and a lot of people do not think about politics past that unless someone presses them for a deeper moral reason (that they arrive backwards at)
They are far from a terminally online phenomenon tbh, even if they are in a slow decline for the last decade or so (mostly because many become regular liberals or right wingers).