*raises eyebrow*
Velocity is a
vector.
It is described by a magnitude and a direction.
Change in velocity therefore can be a change in magnitude (speed) or change in direction or both.
A car driving a circle at constant speed is accelerating, because the direction changes.
Changing the direction of the rubble
is an acceleration, and therefore requires a force. Which means force is exerted on the lower section, not diverted. You haven't avoided that issue. You haven't made a point.
This is basic, fundamental-level physics. Junior-high level, at most.
If you are so ignorant of basic physical principals that you don't even know about conservation of mass or what acceleration is, then you have no hope of understanding more complex physics, such as the collapses on 9/11.