The process of change takes place around us all the time, the only constant in life is change, as Heraclitus said. It is a personal thing, it is a group thing, it is a cultural thing, it is a language thing, it is physiological and thru epigenetics, it influences our genetic in how it affects us and our future generations. Change, much like time, never ceases.
There are two types of social transitions, the kind that takes a bloody revolution and those that take multiple generations, at least three at a minimum if we learn from history. There are social transitions that happen during mass migration of people, and transitions that happen due to the isolation of people over long periods of time. Evolution also means change over time, and it happens no matter what, there is nothing we can do to stop it. I believe riding the waves of change, even if we tumble a bit here and there, is overall better and much preferred to arguing over its arrival until we get washed over.
Acceptance is the first step towards changing our behavior, which means we need to accept our past and accept our current situation. Our past is shared across humanity, it doesn’t matter where you live or for how long. It does not matter the color of your skin, your gender, heritage, or age. There was always someone else before us, and none of us will be here in one hundred years. We were all born into an existing reality. Our past is horrible, we were never nice to other groups. It did not matter if we defined those groups by location (France vs England), by religion (Christianity vs Islam), by religious sects (Catholics vs Protestants), or any other metric - the results were usually deadly to more than a few people. None of us are free of our history, so we should accept it, own it as our shared past, and move on towards a better future.