Deconstructing the South Tower Hit Further

In my last post, I showed how a 767 would come into the WTC south tower, specifically with respect to the core structure of the building. The core structure was constructed of huge box columns.

Specifically, the row of box columns on the eastern side of the core structure would have come between the plane's fuselage and the starboard engine and wing, the wing root area. This would be one of the stronger parts of the plane, in theory, as it holds the wing and the engine to the rest of the plane.

Assuming a 767 hit the building, the wing root smashing into a huge core box column would do one of three things:
1) shear off the engine and wing from the fuselage
2) cause the plane to collapse and accordion around the core column and explode
3) sever the column and the plane would keep going

I do not think a plane that already penetrated the outer wall of steel columns would have enough force to completely sever a core box column. So we can rule out #3.

#2 is not at all consistent with the video, so we can discount it.

This leaves the idea that the core box column sheared off the wing and engine.

Let's even say this happened and the wing/engine and the rest of the plane kept going full speed somehow.

Still, this shearing would break open the wing fuel tank about 35 feet into the building.

Why does the main explosion occur over 165 feet away, out the northeast side of the building?

Why does this explosion, only 35 feet from where the plane is entering, not dramatically affect the tail end of the plane as it approaches the building?

Are we really to believe that a wing and engine would travel 180 feet through at least two floors slabs and exit full speed out the side?