We are all human. Only Jesus was perfect. Many have done evil in God's name and many have and still do quote His word without understanding.
Factually many times the amount killed by Christians were and still are killed my Muslims. Many times that have been killed by Athiests.
So when comparing levels of good/bad, I think the ones done by athiests 'win'.
Using a better scale, how many hospitals, schools, soup kitchens, shelters, charities (of all sorts) have been created by Muslims? Athiests? Gee, want to keep comparing?