See him here, and boy did they not like it.
What that was was Trump turning Alinsky against the Alinskyites.
By using the Al Smith venue he went outside the experience of the enemy. He was supposed to be funnier. Instead he was vicious. He used the unexpected event of the period to be unexpectedly less funny than he could have been. Such humor as there was was very good, and proves he's capable of it. He just didn't use it. Instead he chose confrontation.
And what really pissed the opposition off was that they were forced to listen to it, and broadcast it.
Advantage Trump.