who do you mean with "we" slaves where owned only by a tiny fraction of white americans, and eastern european immigrants never had anything to do with it.
besides, slavery flourishes today in africa, and it exists one way or the other anyway.
Contemporary slavery exists in a number of territories and regions, and Africa is not the only place where you can find it. Bondage labor (indentured servitude) is common in countries such as Pakistan and India and it is almost the same as slavery. But that doesn't take away historical wrongdoings. At least a section of the American public (including small numbers of African Americans and Native Americans) owned slaves.
But then, it is surprising to see only the Europeans getting vilified for their association with slave trade. I am not denying the fact that they played a large part. But in terms of absolute number, it was the Arabs who traded the largest number of slaves. But I haven't seen many people blaming them for the past atrocities. One reason may be that Arabs mostly dealt with female slaves and castrated male slaves, and very few descendants of these slaves survive in the Arab nations.
if people are doing slavery today they can't say anymora that there where historic wrongdoings, considering that slavery exists today there is no point to think the angolo saxon slavery was wrong,
in fact denying withe people to also do and have and own slaves while doing it yourself is an act of racism.
arabs are like the russians with the soviet union, if you admit your wrong doings the world will terrorise you for it, you have to literally execute islams nr.1 diabolically sounding rule, serve "no one but god". only this way people will give up blaming you,
the germans won nothing by admiting they where the bad guy, instead they where eternally blamed and reparations where demanded, but look on japan which never admitted wrong doings, but continued celebrating their deeds or started to deny them, they litterally went away with murder.