As much as I agree btilly might have crossed a line, “hating an idea” would be considered a fatal flaw by many, including myself, depending on the social context and idea itself. Maybe “disapproval” would be a better word in this situation; “hatred” has too much emotional and social baggage that its use even in hyperbole may have to go away if we can ever hope to regain any notion of sensible discussion.
I'm not sure what specific meaning you've assigned to the word hate. In my mind, hating an idea is not a fatal personality flaw.