Basically they say that the combustion temperature of jet fuel isn't high enough to hit the melting point of steel beams. This is true, steel melts at over 2000 degrees while fuel burns at 800-1500 degrees. However, these morons don't know or don't care that heat doesn't have to melt metal to weaken the coated support frame. (Trust me, I'm an engineer :) ) Basically, it's a bunch of idiots being disrespectful of a tragedy because they are sheltered little shits who haven't had life hold them down and kick them in the teeth.