> People got angry over something that happened about 150 years back in time, several generations before even the oldest family members involved were born.

This can vary. My grand-grand-grand-father (Romanian) married a Transylvania Saxon girl who had traveled across the Carpathians in order to run away from her brothers (I think this was around 1880-1890). She was the village's only homeless person, so to speak, had her head shaved (possibly because of lice), nobody was looking at her, apart from my grand-grand-grand-father who chose to marry her. Even though it doesn't paint that great of a picture when it comes to our family's ascendency (as my grand-grand-grand-mother was no aristocrat or anything, quite the contrary) the story got told for every generation since then.