Somebody wrote a dumb question and someone else wrote an excellent answer. It's about atheism, aka reality.

"Why do atheists treat their atheism as if it is a virtue?"

Hmmmmm.....you mean, they take pride in the fact that they require actual fact, rather than primitive middle-eastern fairy tales, and they base their understanding of the world on science and clear, shared reality, as opposed to basing it on some splinter of some weird bronze age beliefs?

I'd say skepticism and intellectual honesty and rigorous pursuit of fact are all things to be proud of.