That's true. Also, having grown up Catholic, I know a lot more about Christianity and Catholicism and its particular brand of craziness. In addition, most religious people I know and come into contact with everyday are members of some brand of that Christianity, so it's just more relevant to me in general. Make no mistake, I am equally as skeptical and condescending toward just about any non-evidence-based belief system I can think of. It's probably safe to say that the more influence any such a system has on the lives and actions of people I know and care about, the more I pay attention to it.
Why don't you bag on Australian politicians? Why do you seem to only aim your criticisms at liberal American politicians?