I'd imagine just about everyone held views that aren't acceptable now back when he was alive, the world was a very different place. Perhaps instead they could stick an information board near the statue detailing his views to educate people on his history rather than tearing it down? There are a lot of bad people terrorising living people in the world today, surely it would be a better use of time to campaign against those rather than a man who has been dead for an awfully long time.