Probably because there were unnecessary insults thrown at his girlfriend.
Did you not read anything beyond that? I've had the same thing done to me about my husband, who has nothing to do with anything. It just comes out at random. And? Why should he care if I think she's a fat ugly chipmunk? He had plenty to say about my looks at random and I am pretty sure he'd make fun of my husband if I posted a pic just for the sake of it.
If you can't handle that sort of shit, get off the internet or stop being a baby.
I wasn't interested to read the whole squabble, I just saw pictures of him and his girlfriend with insults being directed at her for pages and pages on end. If he threw insults at your husband, then I suppose you both need to grow up.