sam,
Who do you mean? Some will be and some won't. What's your point?
That the same applies to theists. Those who want to commit crimes will use any rationalisation they can find and subvert good principles to justify or support their cause. Anyone who thinks that people commit crimes for religion is merely ignorant, either about human history or human psychology.
http://chronicle.com/free/v48/i37/37b00701.htm