Ah... so you weren't actually trying to tar all atheists with the same brush. Good to hear.I did not say that (kinda), I did say that I would have a better chance of being killed by someone who is Godless.
However, I think you're a bit off on your math. You're more likely to be killed by a theist, simply because there are so many more of them than atheists.
For instance, the latest numbers for the US say that the population is about 15% "godless" and 85% some sort of theist. This means that, on average, you probably enounter about 6 times as many theists in your life as you do atheists/agnostics/etc., and that the "godless" would have to be, on average, 6 times more dangerous than theists before it would be more likely that you be killed by "someone who is Godless".
However, you're about twice as likely to be killed in a motor vehicle accident as you are to be murdered by anyone, "godless" or not.