Is he actually racist, or are his moments of unclarity racist?
Even if the racism only comes out during manic periods, it would be difficult to parse that in an online medium. Since very few of us are trained to deal with that sort of episode, it is probably best to avoid the issue entirely.
The best way to satisfy your vuriosity is to read his internal monologue stuff, which he documents religiously: http://www.templeos.org/Wb/Accts/TS/Wb2/Rants/TAD/TADRants.h...