John Wayne is an American icon. Applying today's purity tests to a man who lived during a period when White Racism was the norm is ridiculous. If you are going to do that, then apply the same rigor to Lyndon Johnson and remove all memorials to him. There was never a more dangerous and hateful Racist than LBJ.
Yet at the end of the day, LBJ did the right things on Race. And frankly, he's not really one of the most well-regarded presidents today. He gets a lot of flack for Vietnam (as he should) and for not standing up enough.
John Wayne, on the other hand, made a lot of pictures that glorified a period we've kind of come to regret. The problem isn't just Duke's views, it's the kind of movies he made. The ones where the genocide of the west was kind of okay, because White People. We are rethinking that today. Perhaps we should.