HOW SHOULD I RESPOND TO THIS COMMENT?

So basically some dude called my girl group sluts. This other guy who has no relation to what’s going on commented that (his name is blurred out in red) and idk how to respond. Like this is on my finsta where I like to rant a lot because I can (fyi)

Also if u want my username to go follow me and comment on post just say so in comments and I’ll tell❤️ will love u forever if u go off on him