I like Sam Harris's morality argument in his debate at Notre Dame a while back. Do a YouTube search for "Sam Harris destroys Christianity" for the ~10min clip. Full debate is also on YouTube but is a waste of time.
Sorry for the short first post, was on my iphone. Here's the full video I was referring to. The morality argument against religion should be enough for any clear thinking rational person to grasp. Besides of course all the physical evidence we have that most of the stories in the bible I know of are false (although I'm completely unqualified on both the bible and physical evidence to be considered an expert in either).