What drives people to conspiracy theory?
I do my best to avoid generalizations and I can only give you my experience.
Nothing drove me to it, it just came to me after seeing a documentary on the case, the head-shot(b&ttl)and the whole grassy knoll "evidence", I just thought, there's clearly something wrong here and of course, you say, wow, "they"'ve been lying to us...
Coming online and seeing the whole community so into it, it's great, for so many reasons. You learn how to evaluate evidence properly, to question and research correctly too, to admit when you are wrong like it's nothing and personally, to come to respect and value both sides after realizing we are ultimately on the same team and a very, very small section of society.