Well said. I think the key to the epithets lies in the realization that everyone (especially on the internet) is wrong about so many things, any person who constantly, consistently, untiringly, harps on a single issue is not merely irritating. They're either disabled or a jerk.
So, my advice to internet atheists is to give that issue a rest once in awhile. Pepper criticism amongst the billions of other things people are wrong about. Let the religion thing go for a decade or so. After all, we're winning and can spend a little less time on that issue these days.
(Yes, I'm a hypocrite. I argue about religion a lot, on and off the internet. ;-)