While people on this board are obviously free to use words however they wish, I’d have to say my understanding of the word is similar. To me, a “fundie” is any person of a fundamentalist branch of the Christian religion (essentially “born-again” Protestants). A “jeezoid” is any person who believes that Jesus was the son of god. Their specific behavior is only relevant so far as it informs me of their beliefs (since obviously I can’t look at someone and determine their beliefs, unless they’re wearing religious garb or something along those lines). I can’t say I’m a frequent user of those terms (I’ve never used either one on this board, as far as I can remember), but on the occasions I have used them, that was how I did so.
I’ve know people who have excused their use of the word “nigger” by explaining that they have no problem with black people in general, they only use the term to describe black people they don’t think are a benefit to society. As such, they wouldn’t think “nigger” when they saw a black man dressed in a suit, but would when they saw one dressed like a gangster rapper. Of course, some would argue that that attitude isn’t racist, but if someone does want to debate that, it’s probably best left for a different thread.
Fundie and jeeziod are both pejorative terms for groups of people, and I think ultimately it comes down to is whether those types of pejorative terms, in and of themselves, are a bad thing? Even when they are applied to groups that the applier has sufficient reason to dislike, based upon the group’s actions.
While I’m far from perfect in this regard, it is my opinion that applying pejorative group terms to specific individuals because those individuals are disliked is offensive to some degree, regardless of what group the term refers to.