Wikipedia has a good layout of the "problems" with Christianity:
http://en.wikipedia.org/wiki/Criticism_of_Christianity#Criticism_of_Christian_doctrine
I particularly like this quote:
"The idea of atonement for original sin is criticised by some on the grounds that the image of God as requiring the suffering and death of Jesus to effect reconciliation with humankind is morally repugnant. The view is summarized by Richard Dawkins: "if God wanted to forgive our sins, why not just forgive them? Who is God trying to impress?".
Oh yeah!? I'll show you how to screw around.
La dee dah, wah-wah-wah-wah, poo-bah, dee-da-da-da.
8D sickie
Now that, my friend, is fucking screwing around.