lol, I look back at this thread today and there's absolutely no way I'm folding in this spot. It's good to see no one else will either.

Thanks for the input guys. I guess I just need to accept that sometimes I'm going to run into the top of their ranges and will have no way of knowing what the true bottom of that range is. I think folding in spots like this vs short fish that take lines which make no sense
actually costs money, and hurts the overall bottom line, even if it didn't work the one time.

Also, I like the suggestion about raising the flop a bit more, since he'll call anyway. I think isolating pre is sort of an on the fence decision. It's probably correct to play the hand either way, though I didn't really have any info on UTG so I just opted to limp behind. Plus I prefer only 1 limper when isolating marginal Ax hands unless the first limper is super weak-tight and just folds to the raise anyway.