Why be rude and immature?

I’ve noticed that whenever someone posts a sincere question under R&S there are always a large amount of responses from skeptics and atheists, and none of them are ever helpful. If you don’t have a real answer to their question why put something smart-alecky? Are you all that insecure in your beliefs (or lack there of) that you have to get onto yahooanswers and be rude to people who are actually looking for help? Is there that much doubt in your minds that the only way to feel better about yourself is to make fun of Christians? I’m not saying any of this in an angry way (it probably looks like it because it’s typed) I’m honestly asking out of curiosity. Christians, please feel free to chime in why you think they do it. I’d love to hear everyone’s opinion!