You do yourself a disservice by engaging in incomplete analysis. You do not come out and say there should be no explosion upon impact. And it is good you do not do so.
However, you also do not say when an explosion should appear at the place of impact either, thus your analysis is incomplete.
The imagery of what happened at the South Tower does not support the crash of a Boeing 767 into that building. The imagery defies crash physics. Clearly, by posing a question, you have not refuted that claim. True, you argue the claim, but, once again, by leaving the matter in question stage, you don't refute it.
This is elementary, akin to the exercise in the Dick Oliver thread where the demand was made to prove a crater would form when a heavy steel object dropped to the pavement from a height of about 1000ft. Impact craters are the expected result and attempts to argue against that proposition or to demand 'proof' of it are simply an exercise in evasion.
So it is here.
The imagery shown defies crash physics as demonstrated by more than adequate analogous crashes, shown in the posts in this thread. All of them have in common, explosion on impact.
That does not happen at the South Tower.
It would do you and your position good, not harm, to admit what must be admitted; namely, the shadow thingy that crashed into the South Tower did not explode upon impact. It also did not degrade or visibly slow or shatter, either; once again, unlike anything seen in any other crash shown.