If he's on the left, why are you responding negatively to his concern for cancel culture by attacking the right? If he's on the right, then perhaps there is more cancelling on the right than you want to admit?
Why is it so important that he identified by one of those?
Personally, Horseshoe Theory makes sense. The extremes of both, as Snowden was implying with China and the US, are more like each other than not. Should any get their way and you're in the out-group, you're on a scale of fucked. Even the "peaceful" religions or ideologies are guilty of persecuting those in the outgroup in sometimes very heinous ways. Incidentally, it's strange, but not surprising, that he didn't mention Russia, his own host, where censorship is even worse than the US.