Seriously then what is the temp of burning jet fuel?

The flash point of kerosene is between 37 and 65 °C (100 and 150 °F), and its autoignition temperature is 220 °C (428 °F). The pour point of kerosene depends on grade, with commercial aviation fuel standardized at −47 °C (−53 °F).
Kerosene - Wikipedia
https://en.wikipedia.org/wiki/Kerosene

Not even close to your graph of where the structural steel would begin to weaken. Your argument makes no sense for otherwise we would see melted exhaust manifolds laying in the streets. No planes hit the towers! And a poor example actually of video layering/cropping. Building 7! Right built by the mob!