“Fanatical Unethical Narcissistic Devious Ignorant Embolism”
If somebody can find a better word for E, please bring it on, that’s the best I could do.
Unfortunately though a lot of what’s defined fundie for us in the US has been Pentecostals, mostly from the southern states, choosing over last few decades to violate one of the tenets set forth by earlier Pentecostals to not get involved in worldly politics, and instead run for Congressional office
The reasoning I’ve found they weren’t supposed to get involved in worldly politics is because Armageddon was expected any day now, and “proper Christians” were supposed to focus on preparing for the coming fight with Satan.
A lot of those Pentecostal (primarily Republican) members of Congress had a tendency, and some still do, to push for things that sound like an attempt to hasten Armageddon.
So while most Pentecostals might be sane, or even just a little crazy, the ones most people get to see are complete loons who have now defined your image for the public. Sucks, don’t it?