What I don't understand from the conspiracy theory angle is that if they did plan it, how did they keep the secret from coming out? Say what you will, governments are not really good about keeping big secrets.
Conspiracy theorists have no hard evidence, and the fact that there is no hard evidence for their theories speaks a lot by itself.
As far as I can tell, we could uncover new evidence related to 9/11, and previously unknown information can still be revealed.
I think that comprehensively refutes your point.
As for hard evidence, the
tower collapse in itself is hard evidence, as no steel-framed skyscraper has ever, before or since, collapsed due to fire. Since the NIST report said that the kerosene fires alone were the cause of the collapse, the conspiracy starts there.
And with a false flag operation of this scale surely some documents would have made it to the public.
Your conjecture is that documents would exist, if there were a conspiracy. That's not a fact, that's your opinion. It is possible that there were documents which were all (wisely) destroyed. Or there could still be hidden documents in the hands of people who want to reveal them, but they don't, out of fear for themselves and/or their families. I don't claim this to be true, its just a hypothesis.
Furthermore, if this is such a massively scaled operation, requiring a lot of planning,
how could terrorists in caves pull it off, and more importantly,
where is their damn documentation? (I'm being facetious)