Remember how Amuso made D'Arco ,DeFede and Chiodo into rats? That's what he did here.

He went a bit too far by telling Scarpa Jr "the apple doesn't fall far from the tree" which was an unfair statement considering Scarpa Jr kept his mouth shut and was doing a 40 year sentence.

Amuso turned Scarpa Jr into a rat by provoking him into an attack, that made him a marked man and got him booted out of the Colombo family. Now Scarpa Jr ain't a wiseguy no more and decides terrorists are fair game to get a reduced sentence. That didn't work out for him and like Casso he ends up a rat while still having to do his time.