Obsessive to the point of monomania, extremely reclusive, poor social skills, inability to relate to others on an emotional level, inability to relate to the rest of the world except on his own terms, high IQ, very highly sensitive. He was almost certainly AS and definitely paranoid. His raving about the Jews was paranoia, not AS.
By the way, paternity tests revealed that he was in fact 100% Jewish.
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It's not just what you're given: it's what you do with what you've got
(Si Kahn)