I suspect you know, but if not I will explain, my reference to ‘can’t change’ was in respect of the acts of slavery. There is nothing that can be, or ought to be, gained by apologising for the evil that was done generations ago. On the contrary, apologising for something by someone who was not personally responsible is meaningless and, if I was of African descent would certainly not be mollified by it. In the same way that if someone was attacked in the village, both totally unknown to me, it would be fine for me to express sorrow that it had happened, but totally inappropriate for me to take personal responsibility by apologising.
And to drag us back to the point of the thread, I will certainly not be excusing Putin’s actions against Ukraine by saying
‘Putin colonising Ukraine is OK, since he’s not the only one - other countries were slavers and colonisers too’.