There's the very nail on the head, right in your observation. I suppose this Buddhist homophobic pig did feel it necessary to correct you. Because he's disgusting belief system has made him think he needs to do that.
And that is exactly what religious people must stop doing. If somebody wants to correct us about our human worth or are essential healthiness, then each and every one of us has a responsibility to fight and those disgusting religious traditions.
We must speak up and we must call them out for their horrendous insults.
We must tell them that they are as sick and vile as their belief systems are.