The PC lynchmobs are the ones stopping the conversation. Instead of saying "prove yourself" they shout "bigot!"

The OP itself says that PG is saying "Crazy" things. How are they crazy? He doesn't point out how this is the case. Instead, he's made a final judgment and anyone that disagrees must also be crazy. There is no reasoning with those who shun reason and react to disagreement with accusations of craziness and bigotry.