I used to be pretty close minded about religion, back when I was a christian.
This was me until I took a step back, let all my biases go, and looked at religion from all sides. I was a religious freak when I was a teen. I hate my younger self

After my change, I find that you notice it A LOT more. I tried to have some people look at it from my point of view, but their reaction was something along the lines of "You're tempting me, you sinner!".
Of course, this was when I was 15. Not many people think teenagers are capable of deeper thought than "humping,video games, and anarchy". The only one who ever listened to me was my best friend (he realized he was gay and was having alot of trouble with the whole "gay=sin" thing,) but thats neither here or there.
Not trying to start a flamewar or anything, just saying from experience. I've met religious people who were nice and accepting of other people, but then there are a lot of the opposite.