I try to take a prcatical approach. I look around and here's what I see :
A - People who don't believe in god and don't do bad things
B - People who believe in god and don't do bad things
C - People who don't believe in god and do bad things
D - People who believe in god and do bad things
Deal with C and D based on what they do, and leave A and B as they are.
A - People who don't believe in god and don't do bad things
B - People who believe in god and don't do bad things
C - People who don't believe in god and do bad things
D - People who believe in god and do bad things
Deal with C and D based on what they do, and leave A and B as they are.