Apologies only make sense when offered BY the offenders, or by official representatives of institutions with specific history of offensive behavior. It is not easy to determine in many cases who should 'apologize' to whom.

The Pope apologizing for treatment of (or neglect or) Jews by the church during the holocast might be appropriate, for example.

What various groups and governments and people who are direct descendants of offenders can do is express sincere 'regrets' that offenses ever happened, along with promises to be aware and work toward a world where such things never happen again.