Does this idea really seem stupid?

[frz]

So what do you call someone who doesn't believe in God/s, etc. Seeing as how I'm not very good with words, there was a time when I didn't know the word atheist exist until I looked it up very much later, although I was already a non-believer. The ones described in your religious does not apply like infidel and heathens, etc, since they imply a belief of your demons in your own stories that I also don't believe in.