It's not an encompassing stereotype but US does have some evangelists and devout Christians that believe that the US is a "Christian Nation". To them Atheists

It's not an encompassing stereotype but US does have some evangelists and devout Christians that believe that the US is a "Christian Nation". To them Atheists are the ones that took prayer out of school and that want to take the 10 commandments monuments off court steps. So some people view Atheists as troublemakers. It's mostly a political issue. Realize I'm talking about a small minority, but they're also vocal. I doubt you will encounter them in tourist areas. In tourist areas people are more interested in your money then your religion, it just won't come up. But in casual conversation with strangers, I personally identify as "Not Religious" instead of "Atheist". For some reason the term Atheist carries extra baggage in US.