i think its eqaully as narrow minded to be so accepting of the view that religion is 100% true as it is to say its 100% fake.
There are way more of the former.
Since atheist and agnostic beliefs are generally based on science and provable facts, they generally stop short of the 100% threshold, since you cannot completely disprove a fairytale.
I'm pretty damn sure that there are no fairies down the end of my garden as all available facts in a reasonable mind would lead to that conclusion. I can't prove that there aren't though, no more than I can prove Russell's teapot doesn't exist.
You can call that 'doubt' if you like.
People of faith have no such 'doubts' though. They believe absolutely and completely because they have Faith which means you never have to prove anything.
Who's the more narrow-minded?