I figure a genius mind is more likely to have problems than an ordinary mind, in the same way that the engine in a race car is going to have more problems than the engine in an ordinary car. Basically, if you've got one, you've got to really take care of it. Looking at the discussion over on Rotten, I gather that his prejudices were simply directed at whoever happened to screw him over in life. (e.g. He was anti-semitic because the people who stole some money and expensive stuff from his storage unit just happened to be Jewish.) Trying to make sense of a senseless world will drive you fucking bonkers. I'm sorry to hear that happened to him, but as far as I'm concerned he was a damn good chess player above all else, and his shortcomings were incidental.