Would everyone QUIT saying it's speculation as if that answers anything? We are all speculating on what happened. That isn't a secret or mic slam observation.
As far as Rapp, when a player is off by himself on the sideline and not being supported by a teammate or two, it doesn't usually mean that that player is right and everyone else is wrong. Even when a guy is wrong and steaming and most are trying to just let him cool off, there will be a buddy or assistant or someone there just to be beside him.
I don't vividly remember the sideline shots but I do recall it strange that Rapp was all alone. Which suggested to me that he had done something really egregious. The only thing I could come up with was that he was in the wrong, what he did was bad for everyone and no one was going to go down for it with him.
It was more strange to me because when Rapp was the one who got punched, it seems that he would be getting the lion's share of support for it. Obviously Ramsey was in the wrong but all the other teammates seemed to be siding with him through their actions. So, Rapp freelancing or going against the collective of the defense makes sense.