In contrast, sustained hatred for individuals is more difficult for INFPs (though clearly not impossible). It's much easier for an INFP to withdraw and ignore, rather than continuing to focus on someone who has done us wrong. Fi tends to empathize unless a core value has been crossed. Our typical principles include not hurting others and respecting the values of others. So being actively hateful to an individual is usually in conflict with those values and leads to cognitive dissonance. I think we can willfully nurse a little anger towards someone to block involuntary empathizing with someone who has done us wrong.
So, I think when the question is "do you hate" it gets treated as "do you hate individuals." Most INFPs are going to have a hard time bringing someone particular to mind, even if they do hate them since it's typically going to go against their image of themselves.
If you ask "do you hate a particular social/political/economic system?" you might see a lot more INFP hate. I think we feel more free to vent against systems, since that's doesn't trigger the same "can't inflict hurt" response.