There are also things like Operation Northwoods, a proposed false flag operation, where if it /had/ actually been executed they would never have released any do

There are also things like Operation Northwoods, a proposed false flag operation, where if it /had/ actually been executed they would never have released any documents. If they'd gone through with it then anyone who guessed, or found evidence, of the truth would be written off as a lunatic. Even hinting at the idea of an event being a false flag operation is almost instantly reflexively regarded, in western countries, to be a "conspiracy theory".