My grandparents were fallout of WW I - They left the Ukrainian part of the Austro-Hungarian Empire and came to the USA. I never met them, since they died young, working in shitty jobs like rubber factories (cancer) in Detroit.
Fast-forward... since I never met the "folks from the old country" and only knew my mom and a step father who raised me as American, with no particular culture, other than American, I don't have any animosity towards past aggressors, I am happy with my lot in life.
My take-away, as trite as it may seem, is "what you don't know can't hurt you", and if you forget your (possibly shitty) past and just go forward you will be fine.
If you think you are owed something from those who went before you, you are in for a big disappointment, since those people are dead, and those who are here today only want to know "what have you done for me lately".
Do something and stop whining.