IIIIITHE1IIIII on 02 May 2013
So you are basically asking why atheists sin despite being able not to? That doesn't make much sense and could easily be answered by saying that people are egotistical by nature while atheists don't fear committing sins.
I think a better question would be why believers sin despite being believers. If in the end everybody commit sins whether they believe in God or not, why strive for being a believer?
In any case though, Hitchen's challenge still stands.
