This is why you don't let your "severely autistic" children online to do as they please. Neo-Nazi larpers on twitter, trannies, scat/cuck fetishism, pedophiles, libertarianism, name a known group of groomers for autistic young men and this guy was a flag waving member. There's no coherent ideology here because he's not a coherent person, it's all just things he saw that grabbed his interest or made him feel included and desirable.
In a way it's kind of sad, if his internet usage was monitored or restricted what are the chances he would've not turned out this way. Porn fucks up young people's minds, especially the autistics, they're completely defenceless. Funnily enough if someone had stopped the internet antics of a certain other autist we wouldn't be here.