How should i handle this situation?

A neighbor guy approached my wife saying to her I do not know what to do. My wife and my sex life is terrible. He goes to church and claims to be a good christian. I told him tyhat we are not interested in his sex life and he is very an gry. Called my wife a liar and me a hypo0crite. He yelled that i was a liar saying i served in war. I am a w21 year vetr. My wife and I have been together 28 years and do not keep secrets from each other. We respect this guys wife but i cannot stand him. He has a drinking and anger control problem plus he is a control freak. How do i get this guy off our backs/