Did anybody even watch the video? Joel was calling out Matty because he was apparently acting racist towards TAA's fill in drummer Chad... It has absolutely nothing to do with the slut shaming.
No. In the video he starts off calling out Matty, then switches to a different topic that's bugging him and just says, "a guy" was being racist to the drummer. I'm fairly certain that if the guy in question was Matty, he would've just tacked that on and been like "MATTY IS A SHITTY RACIST GUY AND I HATE HIM" because that's a HUGE offense for a frontman, you know?
Frankly, while I don't really agree with Matty's comments about "sluts," I also am not surprised, given how religious he is, and I think he's entitled to his own views. It's not like he personally attacks girls dressed like sluts, he's just making blanket statements. Sure as hell doesn't effect how I'm gonna dress and whether or not I'm gonna listen to his music.