Worldwide, this is definitely the case. In fact, the number of people in godless religions greatly outnumbers the godless who have no religion. But in the U.S., the number who practice godless faiths is dwarfed by the overwhelming majority who are theists, and the majority of the godless belong to no faith.
“and no argument based in a “probably” carries any real weight.”
It’s a great deal more probable that the overwhelming majority on both sides were theists than the comparatively tiny likelihood that atheists predominated on either side. Atheism was not a relevant factor here.
“There don’t have to be binary definitions, but I’ve dealt plenty of times, here on CD (@Emphyrio), with people who declare that all religion is evil.”
There are similarly plenty of theists who declare atheism, and even all atheists, evil. I was called some variant of evil hundreds of times back when I was a campaigner on alt.atheism. It happens.
“That’s the broad brush that I will not hear, especially after today.”
The violent clash here was overwhelmingly between theists, but I think the issue of faith was mostly an irrelevancy on both sides.