Happ is the only guy with balls to back up out batters. Our only other retaliation was Happ as well when Donaldson got hit earlier in the season. And it has nothing to do with the Yanks either, this is a message to the other 28 teams in the majors.
But if I had to be 100% honest, I think the umps mishandled that game. A warning should have been issued as soon as the first pitch from Happ was behind Headley. If that was debatable, then Severino should have been ejected for throwing inside to Smoak on his first pitch of the 2nd. Two situations where the Warning-Ejection procedure could have been executed properly and wasn't. I don't give a f*** though, almost all the times a player of ours gets hit with intent or without intent we get warned without a chance to retaliate. Maybe this has to do with Bautista getting hit then both sides being warned immediately, 0 chance to return the favour.