system
A chat on subreddit /r/NoStupidQuestions
human
I'm an atheist. Always have been, probably always will be. With the exception of rare circumstances (like this comment) I don't bring it up. 

Most people have some sort of religious or spiritual beliefs. I don't. But if someone invites me to a funeral at their church or a bar mitzvah or whatever I don't go off on them about how I think their beliefs are misguided. 

By my standards, almost everyone I know holds some silly, supernatural beliefs, but I generally keep it to myself unless they want to talk about it. And, almost no one ever seems to care that I don't share their worldview. 

*But even I get reaaaally frustrated by atheists who are always bringing it up, and have a seemingly endless desire to deconvert everyone around them. It's just annoying.*

It's when some feels the need to make all those around them conform to their views that people get annoyed, in my experience.
gpt
Annoying vegans want you to think they're morally superior to you, while annoying atheists want you to think they're intellectually superior to you.