They're not exactly protective of AVGN. A lot of them hate him for refusing to tongue Ghostbusters 2016's anus.
He's also a fossil of the 00s "anything goes" era of youtube where lolbertarianism ruled the web. Commies hate lolberts for all the wrong reasons.
They just hate Doug more because he refused the struggle session his underlings tried to put him through, refused to go from center-left neoliberal to socialist progtard, and occasionally makes fun of their sacred cows instead of sticking to only mocking neo-cons and Christians. They will never forgive him for pointing out how much of a self-centered asshole Roger Waters is.
This is the same soy faggot who made an hour-long seethe video about how Doug Walker mocking The Wall meant he didn't understand the political views of Roger Waters, calling Doug a moron (even though when Doug did the same to non-breadtube icons, they all applauded like seals because it's not misunderstanding/ignoring artistic intent that's wrong, it's laughing at the wrong people that's the true evil).
His soybeard cannot hide the complete lack of testosterone in his voice and body. Not to mention his absolute smug confidence in his 90IQ-but-I-swear-it's-actually-190-IQ-honest takes that all his kin have.