How can you idolize that philandering POS who preyed upon mentally unstable andr/or drug addicted young women? To him, they were nothing more than meat ordered from the butcher shop. Try reading about Marilyn Monroe and then tell me she wasn't screwed by him in more ways than one.
There is evidence that JFK was beginning to reconsider his ways after the death of his baby. Plus, I don't think you can judge anyone by one aspect of their life (unless they commit murder or some other serious crime, of course).
JFK did many good things and was more fiscally conservative than any president since then.