The Academy is supposed to have a code of conduct ( post Weinstein) so can take his Oscar away.
Given that this was a blatant assault, and a clear case of toxic masculinity at it's worst, he should lose his Oscar. He's not a role model, his behaviour isn't something that should be celebrated. There should be consequences for this example of violence.
Even a 6 year old knows you can't punch someone because they say something you don't like.