I think Christian America is far more afraid of atheists, than of other religions.
Perhaps Muslims are as feared as the atheists.
According to Wikipedia, there is single Senator, who is non-Jewish & non-Christian….
They follow Scientology. Scary.
@JLeslie The Vatican is a nation-state, with a culture not likely to allow atheists to succeed as public figures. The USA isn’t as bad as some of the Muslim nations, in terms of levels of personal freedom, but vast swathes of it are fairly comparable, in terms of public attitudes to atheism.