I doubt if JonTron was influenced by people like Warski... Unless Warski argues for things like white genocide being a threat, blacks people genetically predisposed to crime, racial groups being better off separate, etc. He seems to have been influenced by full blown alt-righters.

H3 is completely different. They've made some videos making fun of "SJWs" who deserve it (from what I've seen), and it isn't anywhere close to most of their content. They've spent more time making fun of fake pranksters, fake PUAs, explicitly called out Joey Salads for his racist content etc. They're primarily a comedy channel and not political.

No idea who Fantano is.

So this guy thinks that SJWs are a bigger threat to humanity than Obamacare repeal but when pressed to give any proof he resorts to sob stories

Yeah, a lot of the "anti-SJW" fervor comes from a place of emotion, based on bad personal experiences. (Same with a lot of the "SJW" fervor.) It's hard make headway with a position rooted in emotion. I think the way is to acknowledge and empathize with the fact that some of the left-wing stuff is legitimately fucked up, but put it in perspective (not with Warski per se, but in general).