My wife told me she saw a cable news segment (on CNN or MSNBC) in which an interview subject pulled out the old New China News Agency trope, "As Is Well Known," and said that "everybody recalls" that the bombing of the Marine barracks in Lebanon in 1983 was done by Iran.
In fact, she asked me, "Who do you recall bombed the Marine Barracks in Lebanon?" My response was "Hezbollah," although I am not typically Mr. Answer Guy. As it turns out, per CNN the bombing was traced to Hezbollah, a militant and political group that originated in Lebanon in 1982. Iranian and Syrian involvement was also suspected, but not apparently demonstrated.
Not for nothing did Gore Vidal call this country "The United States of Amnesia."
How "consent" is manufactured. In much the same way as lunch meat.