What's the deal with Grummz aka Mark Kern, the far right gaming "personality" and the videos released today exposing him?

Today a video dropped apprently with information about 58 year old far right "woke hater" Mark Kern aka Grummz, someone who regularly talks with people like Musk etc on Twitter. https://www.reddit.com/r/videos/comments/1jn6n2h/a_deep_investigation_into_grummz_revealing_tax/

There's supposedly stuff like him and his mum running a fetish porn site or something and him sexualising 9 year olds, I don't know how much of this is true.

Can someone with a deeper look into gaming fill me and everyone else in.