I feel like this is the most damning point. So many countries in the middle east would love to see the collapse of the west, proving that Bin Laden didn't claim responsibility would basically gg USA and then all countries heavily related to the USA.Osama Bin Laden claimed credit for it. He bragged about it. And threatened to do something similar again.
So that should settle it.
But then again he also claimed to have a 2400 rating in AOC.