FROM BRUTALLYUNCENSORED.COM
There are many points that the atheist can attack religious doctrine from. Of course, it tends to matter very little in the grand scheme of things, because arguments like those mostly stem from emotion, and thus everyone tends to get lost and no real argument is held.
So one can say all you can about the genocidal barbarity of Old Testament Yahweh, or mention the deeply immoral justice system that hell is, or point to contradictions all day long- that really fazes no well grounded Christian.