I don't think they do. In fact many of the atheists i met are very open minded about religion. They actually respect religious people. So no, they don't hate religion. They just don't believe in it.
Open-minded to what?
Regardless, the terms do not represent comparable things or concepts.
Atheism simply means a disbelief in deities. It is not a belief system, religion, philosophy, or lifestyle. Other than not believing in God(s), Atheists have nothing else in common