Somebody here said it was like someone breaking into another person’s house and locking them in the basement for decades and then being surprised and appalled when they break out of the basement and fight back

The genocide of the Native Americans by European settlers.

Watch District 9. Pay particular attention to the part where they find a nest and break out the flamethrowers.

Read about the Algerian War of Independence (1954 to 1962) – or at least watch this movie: https://en.wikipedia.org/wiki/The_Battle_of_Algiers

I’m not sure how similar it is, but the Spanish "re"conquest of Iberia had a similar weak historical claim across 800 years, and involved ethnically cleansing muslims (and jews), and for some reason the Spanish are remembered as the good guys. Maybe I’m talking out my ass so please correct me if needed