There is no magic in acetylene other than convenient form, it is easy to combine with oxygen. Vaporized jet fuel isn't different.
The towers had all that was needed ro melt steel, plenty of fuel and plenty of oxygen.
When the floor beams started to sag they pulled the verticals out of plumb and the whole thing rolled in to itself like rolling a sock.
It was a simple, uncomplicated process, no magic, just physics. Once it started it could not be stopped.
I know this may be a little off the wall: But I worked as a structural designer in concrete and structural steel for over 40 years; and even as I watched the twin towers fall, I could hardly believe my eyes. But given more research it is very feasable.
We should not forget,a Fed-X pilot attemped to hi-jack a Fed-X plane a few years earlier than 9-11-01 and crash it into the Fed-X hub in Memphis.
It’s like a pastor(Ron Dunn)said:”It is easier for me to say no to Satan, than it is to say yes to God.”
And like the cartoon character in B.C. comics said:.... “Man has no trouble at all believing he can become God;.....Yet he cannot bring himself to believe, that God can become man.”