"But I would like to live in a world where people might disagree with Reg Braithwaite but buy Raganwald’s book."

I wouldn't judge a person based solely on their published content, especially those authors that write fiction. But there are works I'll never buy or recommend because I will not knowingly support the actions/attitudes of the author. (SciFi examples: Card, Hubbard, Rosenberg...)

My choice.