I recently had a run-in with the Anthropogenic Global Warming (AGW) bigots. Now I'm a sceptic: there's a lot of evidence out there which works more than one way, and detailed measurements simply aren't available for sufficient lengths of time. I don't know, but I know that I don't know, but these were of the 'if you're not with us, you're against us' variety. Arrogantly dismissive of everything not in their world view. No consideration of the Little Ice Age or the Medeival Warm Period. And AGW is bad too, if it exists: no thought that it might be keeping us from an ice age. No thought of the effect of volcanos either. Belief but not knowledge.
Bollocks to the lot of them.