See here. The strange thing is that not only do religious people trust atheists less, according to this study, but atheists trust each other less too. Is there any way to make peace with this? Maybe we can, by focusing on the word "trust". To trust someone you have to have a pretty confident idea about what they'll think and do in various situations. Both religious and unreligious people tend to know far fewer atheists, so know less about what they'll think and do. Furthermore, I think religious people are more conventional and conformist. An atheist is more likely to take a novel or even alarming position on some matter of ethical debate. That's a little scary--just the opposite of trust-inducing. Moral of the story--if you're a sober, morally middle-of-the-road atheist, it's especially important for you to wear the atheist label openly. I'll go first--"I am an atheist, and I believe in helping people, keeping promises, being nice, voting in elections, etc." My moral outlook is about the same as that of my liberal religious friends--in fact, I see no obvious difference. Go ahead and trust me!