1999 murder-suicide of the first Sunspot director and his wife
Softened steel resulting in structural failure would not collapse a skyscraper at free fall speed to dust into its own footprint.
It isn't up to us. All we can do is vote, and the lobbyists, donors, and whoever we vote out/in will continue to do Israel's bidding. If a significant percentage of the public learns about 9-11, another enemy or disaster would be created. Our militarized police forces have been equipped and brainwashed to think we are the enemy in case we should do anything more than vote and post twitter comments.
No it would not explain the collapse, not to mention two more collapses, one of which wasn't hit by a plane.