Lol you can't push a defense man into the net who ends up blocking his own goalie. That was clearly no goal.
That whole play was a train wreck, but the main goalie interference was called because Engvall not only threw a player into the net that didn't have the puck, but he stood in the blue paint thereafter preventing the Sens goalie Joey Daccord from having a chance to make a save and move across his crease unobstructed.
Had Engvall backed out of the crease after the dwarf tossing indecent
, the goal likely would have been allowed, as they would have ruled Engvall is allowed to go hard to the net.
As it stood though, there was no way that play was going to be allowed to stand, and by Leafs own reaction they knew and objected very little to the call being turned over. Matthews smirked and objected a little but that was the extent of that.