[The 13th 4postle]

OP do w/e makes you comfortable...don't force yourself to make bad calls just because the math tells you too. If your intuition tells you villain would only do what he is doing with AA and it is too much of risk for you then go ahead and fold. You play your game best when you are most comfortable and obviously not folding KK in theses type of situations makes you uncomfortable.

This will lead to steaming/tilting when you do lose with it and you will lose more money which will not be counted in the all in pot with KK.

Also you seem to be a good enough player to know when these situations are and you should trust your judgment.

Also if someone re-raises me with KK I don't let it get to the three-bet/four-bet scenario because I just shove my stack against them. It will make them make bad calls with a bigger range of hands....TMO

I don't do the above in MTT's of course... Sklansky writes a good section in Tournament Play for Advanced Players where he addresses this situation for tournaments.