I think there just more avenues and reasons to question any and everything we used to believe in these days. There is more information coming to us. It's not like the world pre-internet where the only information you heard outside of your friends and family were your teachers and the radio. You don't have to discuss these uncomfortable topics with anyone anymore. You can research on your own and begin to think about these things on your own. You're no longer concealed to a bubble. The church just doesn't play the same role that it used to. I think I've always benefited from going to a very liberal church and even I question things all the time. I've never stopped believing, but I don't take anything at face value anymore.
Edit: And that is my 1,000th post.