Finland (about 85% Christian) and Iceland (over 90% Christian) are 11th and 12th highest for assault. Norway (over 90% Christian) is 17th. These statistics are half a decade old - and are debatable, but the big atheist countries places like China, Vietnam and Russia.
Okay, I had a lot off text written but I feel this is the wrong place to discuss it. Just in future, be more careful when posting stuff like that. In reality, the nordic countries are very atheistic orientated (or at least non-christian).