Getting life threats for not agreeing on something on a facebook group

There was a post on one of the group in facebook for police harassing couple in the park I felt it's provocative and besides I have seen what couple do in the park besides the bush in front of my room and we ultimately had to call police to stop that. so I said whatever police is doing is correct. but the guy who posted it didn't like my comment and posted R u freaking retarded ??? or blind ?? I mean did u not hear about the incident where Mumbai police harassed married couples ???? Did u see in the video that they were fucking ?? DO U KNOW WHAT FUCKING IS ??? OR U R JUST FRUSTRATED THAT U DON'T GET IT OR WILL EVER GET IT ? HOW COME U R SUPPORTING THIS SHIT ? NO ONE WITH THEIR RIGHT MIND WILL COMMENT THIS SHIT WHAT U JUST DID and I made my comment but after some argument he started making personal comments and said he would break my bones and make sure i don't get up from bed for 20 days. I will like to know what I can do on this?