He was one of 3 founders of "Voice of Montreal" in 1994 and was bought out in 1996, when it was renamed Vice. That's...pretty freakin' distant a relationship to object to.
Having said that, though, Vice has a pretty clear political slant, and alt-right is definitely not it. So I'm in hard agreement with your conclusion -- I mean, if you object to white supremacist co-founders, Vice kicking theirs out and cutting ties with him would kinda be a net positive, right?
When in doubt, I'd rather not fund this.