There is no way this question is in good faith. The reasons are abundantly clear, and even if this was somehow true ignorance, a single google search will answer it.
You are interested enough to ask people to explain why they wouldn’t want him on a website.
I’m curious, have you not googled him in the past six months?
If no: Why are you asking about him here?
If yes: Could you make a guess as to why someone might argue that he should be kept off of a social media platform? Just a guess beyond “not liking him”?
If you aren’t capable of guessing a reason beyond “not liking him” given up to date information, you will categorically disagree with any answer to your question.