I don't want to sound like I am stepping up to defend JonTron, because I will say it right now - I'm not fully versed in the remarks he made that going him labeled as a white supremacist outside of one or two key phrases, but I do want to chime in regarding this comment specifically.
At what point do we hang people out to dry forever over something they said or did? You say he "made the right PR moves" but don't offer up the possibility that maybe, just maybe he educated himself after the fallout and came back with a changed viewpoint. We cut these people down all the time and then try to banish them from existence in our media, under the pretense that they are toxic at their very core and nothing will ever change that. This doesn't just apply to the Racism argument - we've seen plenty of witch hunting after things posted by CD Project Red's social media team this past year too.
People are inherently ignorant, and most of the time won't go out of their way to fully educate themselves on a topic until they fuck up in some way and get shown the way. Once that happens though, why do we all just simply say things like "oh now they're backpedaling" or "whatever dude, you can release all the statements you want, but you're still a racist piece of shit." We never seem to even offer up the chance for redemption - we just want to watch them burn at that point.
It just seems kind fucked up, is all.