It got showed again and again and again. It was pounded into you that you must remember where you were "when you heard".
It was drilled into school children that the Nazi sympathizer Boozer clan was American Royalty.
Major propaganda was employed about how wonderful and beloved the guy who had to cheat his way into office and was not going to be reelected was. If you remembered things differently about President Good Hair then you were made to feel alone. There was no internet to connect with like minded people, no talk radio to point out that the guy we were suppose to be morning left thousands of our allies to die, gave the communists a base right off our shore, nearly caused a Nuclear war, gave up a vital defense in Europe and was dragging us into a land war in Asia.
No, the anti-American press controlled the narrative and so the country was mostly brainwashed.
And it persists to this day.
I remember JFK Junior telling the story that he was trained to salute the casket during the funeral procession. He kept saluting with the wrong hand so his Mom gave him a flag to hold so he would salute with the correct hand. To be so concerned about optics at that time is very sad.