I and others "see" this because we've taken it upon ourselves to have be critical thinkers and to have researched into instead of blindly following along with popular opinion. Now tactics such as false flags ala 9/11 have been around and have been well documented for years. Go ahead and look into it for yourself. They are pre-planned orchestrated controlled events used to sway public opinion, governments have been using this tactic for years, again it's not made up tin foil hat nonsense you can find this documented.
most people agree it's happened a lot throughout history. Reichtag fire, etc. I think most people just don't think our govt would do it. True, we now know Vietnam was started on a "middle mgmt paperwork error". We know 1898 was a big "mis-info" campaign to get us into a war. And there's a lot of evidence JFK was an orchestrated event - even in the unlikely case there was only one shooter, there was a network behind Oswald, Ruby to make him STFU, etc.
While it's happened before, there is a belief that "this particular one wasn't staged, they woudln't do something that big".
So they'd waste JFK, but not 3000 randompeople, whose deaths would open up decades of war with oil-rich nations, right as saudis kick out our bases and saddam drops the dollar? lol mmkay.
The smartest people will agree on one thing - WE DONT KNOW. We don't know that XYZ happened, as the loose change kids say. And we definitely know the 'official' story, called an underfunded whitewash by it's own authors, sure leaves out a lot of details. The fact people bought a shitload of stock and bet those 2 airlines would tank a day later - well, that goes beyond 19 pricks with boxcutters.
we don't know. we'll get details in another 55 years when it's declassified, but really we'll never know. Anyone who claims to know either way is just making shit up.