Well can’t be bothered to read it all.
But as for the building collapsing one of my friend who makes a living as a civil engineer control officer told me two things.
First even the building “might” have wistand a plane crashing on it, it certainly wasn’t a massive plane “fully loaded with petrol”.
Second the collapse of the towers, rely on the construction of the building. They did no collapsed because of the initial impact, but because of the tremendous heat generated by the fire. Such heat would have melted the steel structure (he told me steel is about the worst material during a fire). When a couple of level collapsed, the increase of weight on the remaining structure was too high.