Have you done the numbers on this? I have, on other fora. As I've said to you in other threads, I'll not be repeating the math for you as you have not demonstrated sufficient return of effort for posts longer than about 140 characters. I expect to be disappointed by your response to this post as well.
That said, consider this:
A random 100 lb piece of "stuff" (such as a chunk of airplane) traveling at 450mph (660 feet per second) (rounding down from most estimates of flight 175) would need to decelerate to zero mph on contact with a target, and the impacted target would need to possess both the strength to resist the impact and the resilience to return some of the impact energy back to the object in the opposite direction. If you give that 100lb chunk of stuff the full length of the plane to decelerate, ~160', that would give a bit less than a quarter of a second for that object to decelerate.
As you claim to be educated to some level or another I'll leave it here for you to do the final calculations, to determine at how many Gs the impacting 100lb object would need to decelerate to come to a complete stop at the surface of the building. Then perhaps you might run the numbers for how much lateral loading the perimeter columns should be able to withstand.
TL;DR VERSION:
Your assertion does not reflect reality.