Most of the truther stuff is nonsense based on their lack of understanding of physics, architecture, and engineering. The reason the towers "looked like a controlled demolition" (for example) is because skyscrapers are designed to collapse inward and down. Otherwise, they'd go sideways into other buildings. Who then crash into other buildings. And now the whole city is in ruins because these giant-ass buildings were large dominoes.

The Loose Change goons tried citing this as irrefutable proof, then called Popular Mechanics a yellow journalism magazine when they did their issue on how 9/11 happened.

Now, whether or not the Bush administration knew about it beforehand and let it happen is another story. Or that the hijackers were from countries not Iraq or Afghanistan. Or Cheney leaving the country on a flight to Saudi Arabia that afternoon when every flight was canceled and every other politician was being moved to secure locations. These are things 9/11 truthers don't really mention other than to say the Bush administration planted explosives in the towers or all the passengers were crisis actors.

IMO they're still Alex Jones adjacent. Like yeah, Alex Jones is partially correct in profits being made every time there's a school shooting. His conclusions, however, and his reasons for those conclusions are flat-out wrong and reactionary.