Anyone can say anything they want if they believe what they are saying and are being honest. What's wrong with expressing an opinion? You give extreme examples of Hitler and the KKK where there words and opinions translated into hateful and criminal action. That's completely different. If Manu said, "I hate people who believe in God and I hope anyone who does dies," that's different. That's not what he said. All he said was he didn't believe in God. Not hateful, not criminal, not even controversial as you suggest. Just an honest, personal answer. Let it go. You have no solid or basis or reasonable foundation for your argument.