It's quite obvious that there is a huge amount of real hatred for atheists amongst some groups of people. American Christians in particular seem to be particularly virulent—which is not to say there are no American atheists, there are plenty. But they are definitely are in the minority and are frequently victimised.
I live in a country where that simply does not happen. France takes its secularism seriously, and I sometimes wonder if that is the real reason for the resentment so often shown by Anglo-Saxons against France and the French. But that is for another day. Here, nobody cares if you're an atheist. In fact it's the default position. People, generally, at least educated ones, will assume that you're an atheist, or at least a secularist, without asking. France actively excludes religion from all State functions, including schools, and has even curbed the most offensive of public religious displays.