Trouble is he goes to every other forum and has a pattern of starting debates and insulting posters. That disrupts the flow of Support Forums . Many people think it would be helpful for him to stay in his own forum.
This has come up with other disruptive entities in the past.
He thinks he has an exclusive brand on "the truth" and this has become his fuel for the disruption in other forums. it would be different if only one or two people noticed this pattern but the notice is widespread.