One side of the building had been gutted by a very large section of one of the towers falling on it. The whole building was leaning badly toward that gutted side.
Truthers claim the official story with the towers is that jet fuel melted the beams. The real story is the beams being heated and warping which snapped the bolts holding the trusses.
So the dispute is over the quality of construction? Imo truther claims are all over the map. You'll have a hard time convincing anyone that every support in 7 failed simultaneously.