Remember, the original colonists put up with Britain's sh*t for YEARS. They were not represented and unfairly treated for YEARS. Britain treated the colonies as their personal piggy bank via taxation for YEARS. And many of the patriotic founding fathers were dismayed It was only when they marched out to confiscate the armories at Lexington and Concord that the colonists finally said "aw hell no".
Human nature being what it is, patriotic fervor tends to come and go.
In 1772, when it seemed to be more going than coming, James Warren reported to Samuel Adams from Plymouth about the towns he had been canvassing: “They are dead,” he lamented, “and the dead can’t be raised without a miracle.”
“Nil desperandum” (Never despair), Adams reminded his friend. “That is a motto for you and me. All are not dead. And where there is a spark of patriotic fire, we will rekindle it.”
1950: I bet we'll have flying cars in the future.
2020: Peanut butter and jelly sandwiches, are they racist? Coming up on 'news at 10'