Hmmm, JWs and universalists are the hardest ones, that's interesting.
Normal fundamentalists are very honest, like telling ;"you are going to hell" etc......but universalist hide behind a liberal intellectual facade..
Maybe in a way there might be the same dishonesty among JW's expressing thier true beliefs. A JW is trained to spread the word , not to discuss his/her personal wiews. A preaching JW is in "field service" mode, not in his/her true personal mode. When things get a bit tough a trained JW will change subject or leave the discussion.
OK, some thoughts from me.........I think this subject is really interesting. It's probably about psychology, maybe also abut cgnitive dissonance.