Except that atheists DO believe that religion is myth and that it clouds the minds of believers. That IS a statement of atheist beliefs, whether you like it or not, just like a Christian telling me that I'm going to burn in hell for eternity is a statement of evangelical belief.
I don't believe either are hate speech, in fact, I find the very concept of hate speech un-American. Americans have FREE speech, which means that we tolerate even that which offends us because that's what freedom of speech means.
America is tough stuff. It's a high level class, not civics 101. It means defending the speech that makes you want to punch someone in the face because that is the epitomy of free speech. Government does not have a role in determining the way speech is conducted in public, or in determining which religion will be the predominant one. Government is NEUTRAL in such issues.
Some Americans clearly aren't cut out for America, and need to move to Canada where they can be wrapped in bubble wrap and looked after by nanny lest they ever be offended again. Their widdle feewings are far too tender for this country.