At this point I wouldn't risk it, assume all youtubers are scum, safer that way.
That's a pretty wild assumption though.
There are way too many who do videos on YouTube for a living and only the lowest percentage of them are actually on the same level of JonTron in terms of ethical and political views.
For example, I wouldn't expect people like Jeremy Parish or Mark Brown to spew right-wing bullshit.
JonTron is a whole new level of stupid and sadly it unfolded only very recently.
I had great respect for the man because of his high quality videos, but sadly he just couldn't keep his super controversial and just flat out bad political views to himself, so all respect has been instantly deleted.
I don't think anyone wants to have anything to do with him right now. Not that I have any evidence for that, of course. It's just pure speculation on my part.
As I wrote in a post above, I hope this serves as a wake-up call for him.