I've met a number of folks in the latter category. Honestly, though, a religion is known by the actions of its followers. Islam isn't considered a bloodthirsty and barbaric religion simply because Christians say so. When someone sees Christians gloating at the prospect of their enemies burning forever in Hell, or who preach loudly it s their way or the highway, it's bound to turn him or her off.
"By their fruits you'll know them" and all that...
Right, and that's why I can understand why people are turned off to certain (or all) organized religions. But to immediately conclude that there is no God based solely on the fact that certain organized religions are made up of bad people...well I don't think that's wise. The question regarding the existence of God, a philosophical question, is separate from any question regarding the correctness/incorrectness of a particular religion.
None more so than Darwinists.
And a more self-righteous and smugly self-superior gaggle of dorks has never been spawned.