GenZedong

he was in on it definitely. if you're into following money trails look into the CIA front company "Ace Elevators" (doesn't exist anymore) that got the WTC elevator maintenance contracts instead of Otis Elevators, probably the biggest name in elevators and elevator repair.
if you're into architecture look into the collapse of WTC 7. According to NIST, it collapsed purely from an office fire, and that debris from WTC 1 and 2 nearby only did superficial damage. (Bots who argue it collapsed because of falling debris are figuratively "conspiracy theorists" that go against what the gov says)

If you're into human interest stories there's a LOT of them as well

Imo the conspiracy is the conspiracy, if that. America got caught with its pants down and Bush did 911, the planes were holograms, etc. is just there to detract/as cope from the fact that the US had spent the last decade doing nothing but masturbating over the corpse of the USSR.

The United States has NEVER needed a reason to invade another country, they've never met a false flag they didn't love

E: it should be noted how important the Twin Towers were symbolically, as well. Why blow up your grand temple to financial capitalism when you can just... say a military base was attacked by Iraq or whatever. If anything that connects the dots easier for your populace than Saudi Arabians attacked the US so we need to go into Afghanistan, except now we're at war with Iraq again. It's both sloppy af while also requiring an orchestra operating in complete harmony

Yes.

What was the Saudi involvement about?

not bush individually but american foreign policy. just read osama bin laden letter, it's fairly simple.

Probably not. It was just like Pearl Harbor where they knew something was up but didn't really try to stop it.