As a former person on the fence leaning toward creationism, I have to say from my experience, it was based more on what I didn't know rather than what I knew. I was one of those faith people, who had no idea one way or the other, and in matters of faith choose God instead of science. Admidtedly I still do not know much about evolution, but I see the flawed thinking behind creationism, the more I learn, them more it seems evolution is the correct answer.
As far as those leading the crusade for creationinsm, those people may be liars, but the majority of us who fell for thier lies are simply ignorant of the information.