generally people are idiots and can't pull a conspiracy of this immnese magnitude without talking..slipping up etc..atleast not in this day and age.
I used to think this way. But if you think about it, they are able to get into power, then effectively manage a country of 300 Million people.
They have unlimited money, control of the media, badges which get them into anywhere, the sickest technology on the planet, and they can hire those nice little teams from overseas which can coordinate anything. And in this case, they had the lease to the buildings, they put their own security team in, a month before. They managed the air defenses that were eluded. And, they did their own investigation upon themslves!
So even if they did fuck up along the way, and there were some flubs, they are able to put out enough disinformation to make it so messy that most cannot see through it all. And there are dozens of people in govt, whether is be former bush cabinet people, former military people, etc, who spent their life doing this stuff, who outright believe it's a self-attack.
So they may get away free, but all will know. 36% of American believes it now. Another two years, with the movie release this year, it'll be 60%.