This is the argument that Penn Jillette makes as to why he is an Atheist and Libertarian. Others have posted part of this, but the key item here is the difference between Democracy and a Republic:
I don't believe the majority always knows what's best for everyone. The fact that the majority thinks they have a way to get something good does not give them the right to use force on the minority that don't want to pay for it. If you have to use a gun, I don't believe you really know jack. Democracy without respect for individual rights sucks. It's just ganging up against the weird kid, and I'm always the weird kid.
Read the whole thing HERE.