Look this isn't rocket science.
Why would you fake plane crashes when there are thousands of jihadis willing to plan them for you?
The intelligence community depends on a complex web of comms to effectively communicate. One piece goes wrong and you have a terrorr attack.
If you wanted to cause an attack and you are stopping attacks all the time, would you plan it to a T, or just open a crack in the wall.
Plausible deniability?
It's all in the official report if you read between the lines Gentlemen.