The broader issue here seems to be that C.Y. isn’t a random online person venting, in that allegedly the VP endorses his stances [citation needed]. If he was a random kook with a blog nobody knew, we would pay no attention to it.

But actively suppressing dissident speech is indeed the slippery slope, and he may get more endorsements as a result. Plus, it just looks bad to silence opposition because it makes the anti-fascists look like fascists. This has been addressed in one of the other comments.

Therefore the way you handle these types of situations may count for a lot. Or it may count for nothing and the response is overblown. Seemingly, it’s worth something given the amount of attention he is getting. Choose wisely.

Edit: I should point out that the same dismissal and suppression has led to 2 terms of Trump. So maybe there is a lesson to be learned rather than closing eyes and putting hands on ears like what this thread has exhibited.