From the article/website:
... Carefully review footage of the collapses, and you will find that the parts of the buildings above the plane impact points begin falling first, while the lower parts of the buildings are initially stationary. The parts of the towers below the impact point do not begin to fall until the higher floors have collapsed onto them. ...
From the above little excerpt, it would seem that the demolition idea is almost absolutely proven false. The author goes on to say:
... This is not what we would expect if the towers collapsed from a controlled demolition, but it is exactly what we would expect if the building collapse resulted from damage sustained by the impact of the planes and subsequent fire damage. A conspiracy theorist may counter that the buildings were rigged to begin falling from the top down, but what are the chances that those planning such a complicated demolition would be able to predict the exact location the planes would impact the towers, and prepare the towers to begin falling precisely there? ...
The point is, a good demolition team can do exactly this, make buildings fall
almost in any way they want them to.
The reverse of the second of the two quotes, above, clearly contradicts, and virtually reverses what the author is trying to say. That reverse point is, how could two planes make a demolition-like crash, when demolition would have had a hard time doing it?
In other words, controlled demolition is just what it is called...
controlled demolition. Random jet plane crashes do not do the
controlled part, even though they might do some "demolition." The Towers came down way to perfectly for anything other than demolition.
If you read on to the next paragraph in the article, it talks about that Building 2 started to topple at the top. This is evidence of the imperfect state of demolition technology. There is/was nowhere in the world that the demolition teams could practice ahead of time on something like the Twin Towers. The fact that they were able to stop the topple of the Building 2 top where they did shows that they were top experts in the demolition field.
When you check the rest of the article/website, you can see similar, subtle flaws in the thinking that it wasn't an inside job. The author did a good job of covering up the points that show it was an inside job. Read slowly, and think with deductive reasoning, and you will see that the author essentially proves that 9/11 was an inside job by not expressing the most important things about the exact points he makes.