Average citizens like me can only do a little research of whatever's online and speculate from what we know and see but there is a grand jury coming and there are witnesses with evidence we don't know of so until then I guess we wait.
But my hypothesis is that they had explosives in the basement which many many many witnesses have attested to .(..firefighters included and cops) then nanothermite ( 45-degree angle wraps) -( one of the cut columns Illustrated the op).....these would have probably been placed on two separate levels maybe a third of the way up and 2/3 of the way up..... just enough so the collapsing upper sections would have no resistance from below.
But hey who the f*** am I to say ?
Well, you got one thing right in your post. You Do only a little bit of research. That's why you don't understand anything.
The core columns were not massive box columns made of 2" thick plate all the way to the top. They changed to I beams. It's a fact. Want proof?
Next, your "thermite cut" shown in the OP was actually made from a torch used during cleanup. I can prove that also.
This'll be fun.
You up to the challenge Angelo?