So it was slightly on its side. Ok lets go with that.
There's plenty of footage of the impact where the planes are clearly shown to be quite slanted on impact. Those things have a huge wingspan, which, as uknowist pointed out, was enough to spread the impact site spread over 7 stories. Furthermre, THE PLANE DID NOT COLLAPSE FROM THE IMPACT! Planes are made from lightweight aluminium, it might have snapped a few girders (largely due to the stresses created on them by other parts of the building deforming on the aircract's impact rather than from the plane itself) but there was no way the fuselage would have created enough damage to cause it to collapse: aluminium is too soft and light to shatter steel, regardless of the speed of impact - it was the fire weakening the metal which caused the collapse!
In the northeast corner of the south tower's 80th floor, where office furniture had been shoved by the plane, the fire burned so hot that a stream of molten metal began to pour over the side like a flaming waterfall.
Source -
http://www.911-strike.com/NYTimes_WTC.htm
He was 2 floors below fire so hot it apparently melted steel, yet he only saw 2 small isolated fires and mentioned nothing of this blazing inferno?
As explained multiple times in this thread the fire was not hot enough to melt steel, only to weaken it sufficiently to precipitate collapse.
Surely the holes made by the wing tips would have been more then enough to let the molten steel pour into that floor? Surely the heat from the melting steel and the fire would have made temperatures far in excess of what the human body can withstand?
Oh, surely. Sarcasm aside though, I have an issue with the way you're ignoring evidence and substituting them with your own speculation. Surely you can't know how big the holes made by the wingtips were, where in the large area of the 78th floor they were located, and whether they were vertically aligned with the supposed waterfall of "molten steel" on the 80th floor so as to allow it to pour through to the 78th? (which incidentally could not have been steel, as we have seen that jet fuel doesn't burn hot enough to melt steel - maybe it was aluminium as unknowist said, maybe whoever told the NYT this was mistaken about it being molten metal at all, as, after all, he was obviously in a situation very much resembling hell during a nuclear holocaust and cannot have been expected to make accurate observations). Surely you don't know what temperatures the human body can withstand (specifically when wearing protective gear as those firefighters were)? Surely you don't know what the temperature was on the 80th floor (overall, not just the spot-temperature of the fires in it), how much heat-insulation there was in-between floors, and what the temperature would have been on the 78th? Surely your speculations, while logical, are not backed by any evidence at all and are based on nothing but you picking holes in the stories you've read without cross-referencing your thoughts with scientific data to see whether your concerns are valid?