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Clearly the black smoke indicates a low oxygen fire, when the color of smoke is determined by what is burning, not how hot it's burning.
The black smoke is unburned carbon, indicative of a lack of oxygen.
This effect can be clearly seen when lighting an oxyacetylene torch, when the acetylene is first lit without the oxygen the torch emits copious quantities of black smoke and a yellow/orange flame.. Turn on the oxygen and adjust it to the proper setting and the smoke completely disappears and the flame turns to a blue color.
A summary: You have not a clue what you are talking about and is painfully obvious to anyone who does.
Not to imply I think the WTC was purposefully demolished, just that I know you are ignorant of combustion physics.