I find it odd in kayfabe its Steiner he's going after. Nash is the one who betrayed him, his issues with Angle are well known, Sting took his title, hell even Booker he feuded with a while about six months ago and has a championship to take. Yet its Scott he's going crazy over.
It's a stable. He's starting at the bottom and working his way through them to the people he really wants. Only problem is he's this insane at the bottom then down the road it'll be treated as a regular match for revenge against Angle, Nash or Sting.