The key issue as I see it is that - contrary to what many people have asserted in this thread - the post which received the warning was not simply declaring that CP’s beliefs amounted to racism. The actual post was:
What Inbred is saying here is that CP is not not just being incorrect in his interpretations of the evidence, but is doing this deliberately due to his “politics”, and on this rests the accusation of racism.
There’s a huge gulf between that and simply defining someone’s expressed beliefs as racism, and people who claim it’s all about the latter are misrepresenting the situation.