Operation Northwoods
Here you are proposing an explanation about what may have happened on 9/11, which I am NOT attempting to do. How would I know?
But if you want to go there, there are legitimate historical precedents of people in power deciding to sacrifice some of their own people for what they think is the greater good. And it may have made sense from an ethical standpoint if the definition of the greater good is the right one in terms of being shared with a large majority of an educated population and aligned with a reasonnable common ground of humanitarian values.
When you think of it, it is exactly the dilemma of the president deciding to shoot down a hijacked plane with 300 people on board instead of letting it crash on a city and
risking to kill 10,000 people. In this case the probability that 10,000 people would actually die is very high and most citizens would agree that there is no other
choices. It would probably be an ethical decision according to the classical definition of the term that assesses causality, knowledge and choice. You
know you decision will
cause the death of 300 people, but you
don't have any other choice. So in this case, killing 300 people purposedely is the the right decision to take. Not a story I would tell my kids obviously, but this is the world we live in and grown up sometimes have to make tough decisions, at least some people who put themselves in mission critical jobs such as presidents of large countries. There are many examples at smaller scale and letting a trekking companion die to save the rest of the group may be easier to relate to and is the exact same story. As the series 24 has gotten us accustomed to, sometimes you've got to do what you've got to do.
Anyway, this is ground for interesting debate, but this debate isn't let to happen because of what has become the sacred nature of 9/11, starting with my point which is figuring out what really happened on that day. Why would an independent investigation be an issue if the official story is a faithful description of what truly happened?
Cheers,
Bernard