Stew

R3 attempting to steal home, 0 or 1 outs. Normal batter interference would see the runner from 3rd out. But if the pitcher steps off and throws home, is it still the runner stealing that is out? My thinking is that since the pitcher steps off and is no longer a pitcher but just a defensive fielder, logically wouldn't that make the batter not a batter and just another offensive player(since he cannot bat the ball), and therefore it wouldn't be batter interference but simply offensive interference which would see the "batter" out on the interference and the runner attempting to steal sent back to 3rd?