It is possible to respect or find interest in certain aspects of other individuals without having to embrace the entire individual as some sort of role model.
This pretty much explains the entire topic.
After all, I don't see how this entire debate was brought up, of course he was an antisemitic, but he was highlighted as a wonderful chess player, and nothing else. I can't see why it's so hard to grasp that you don't have to like every thing about a person.