Well, that's rubbish of course.
If you can find a recent speech or e-mail or something of his which demonstrates that he still holds that view, I wil challenge him on it.
It is possible for people to change. I don't doubt that.
No doubt the remarks he made about gay people were made back at the height of the Aids crisis in the 80's. So yes he could have changed. Although would you have said that then?
It's just that his pattern of behaviour really suggests otherwise. If he's indulging in, and defending black face as recently as 2019 then it points to a mindset that is, shall we say, less than enlightened.