Thank you all for your thoughts!
Although this event, and the Beatles entire career, was before my time, I have to admit that their (and John and George's) music played an enormous role in my childhood and adolescence.
Because of my youth (John was assassinated 4 years before my birth), I was introduced to the music well out of order. My first recollection of/introduction to this music was not even The Beatles:
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My mother loved to play traditional Christian Christmas music during 'that time of the year,' but she would always play this John Lennon song too. From a very young age I had started to register some awareness that, within the mix of Christmas music she would play, 'one of these things was not like the other.' (I blame Sesame Street!)
When I was in Grade 1, during Operation Desert Storm, I remember listening to the background chorus and thinking, "Wow, it sounds like they are saying, 'War is over, if you want it.'" I dismissed that interpretation though. My classmates were blithely repeating the hate they overheard at home, and I was utterly perplexed by their apparent madness. (Sometimes I wonder if parents don't realize just how much their young children listen, observe, and internalize.) And so at the age of 6 (apparently having already turned into a cynic) I rejected that interpretation of those lyrics, as much as I wanted them to be true, because I felt most adults thought the same (excluding my parents), and why would an adult sing about war being over when it seemed clear they didn't want it to be over.
(The above is not intended to start a political discussion.)
By the time I got to high school I was up to my neck in The Beatles. Sophomore year I listened to the White Album on repeat. Junior year it was Revolver. Senior year it was Abbey Road.