In my experience, ISFPs are very kind, but don't have any problem being cold to someone who has really offended their values. I like that they tend to avoid passive-aggressiveness and make it pretty obvious when they're not happy with someone.
I am also very kind and generous to a fault. However, cross me and I'll never speak to you again. I really need to work on forgiving and forgeting. I also have imaginable, irrational hate for some people who I believe lack in ethics, integrity, and character and I've never bothered to get to know them because of my hate and prejudice.
I'm good friends with an ISFP and have been for 15 years. She's very open to people and can be very kind, but she has her limits. (As we all do.) She was the first person that I ever really meshed with as a teenager.
I've known three ISFP girls and they're all very, very nice. Gentle, even. Probably the kindest I've ever met. But I've noticed that yes, they can hold grudges. One girl I work with who's been talked very bad about dons a very resentful attitude when she talks about the people concerned. You can't blame her, of course, for feeling negative but it's just always kind of a shock when she turns from having a super nice demeanor to thundercloud face.
-stellar renegade coo-oo-ooool this madness down,
stop it right on tiiiiime!
That's interesting. I've long been wondering how the kind ISFP would feel about someone who admires him. Then about someone who admires excessively (adoration) and then becomes dependant. And what if that person was sucking the life out of you and whinning all the time?