Since you asked, in my person opinion I think some bad men hijacked the planes and flew them into the buildings. I think the towers fell on their own accord and I believe pretty much everything in that one Popular Mechanics article on debunking 9/11 conspiracies.
I also believe that the principle of
Occam's Razor applies here as with most conspiracy theories.
You can argue that Osama was trained by the CIA and had other motives for his actions than what became the focal point (Iraq) as the result of 9/11, but I get offended when I see all these armchair rocket scientists arguing about the temperature of burning jet fuel and the melting point of steel.
The same instant master architects and construction experts insist they know things they simply do not. Similar to the Sandy Hook conspiracy nuts who are now suddenly all clinical psychologists and long-careered thespians. They're none of those things.
Who needs chemtrails and water fluoridation when you've got Alex Jones, the world's newest and greatest Rush Limbaugh?
I knew that would be your answer, I just wanted to confirm it. You are a man who has very strong opinions but doesn't have good reasons for having them. Many of us have spent years researching these issues so encountering people like you is very familiar. You are simply wrong about 9-11, Sandy Hook, and probably most everything in your mental landscape. But there's absolutely no point in going into the details because your mind is made up before you know the first new thing about them.
You are either lazy, as in "I wouldn't want to have to rearrange my whole belief system to let this startling new information in, so I won't." Or you are arrogant, as in "If there WERE such huge conspiracies then someone of my intellect would surely have figured it out." Given the high opinion you've expressed of your mental faculties I'd say it's the latter.
I'd be willing to bet you are a software engineer.