The expectations of some that we should apologise for what our ancestors did, the past is history and we cannot change it. What we can do, is to Try our utmost to see that terrible things are not repeated.
We can also recognise that many of the advantages that we have as a society are directly linked to the exploitation of other societies in the past, and that the opposite is true. Apologies for past behaviour are one thing, but it is more important to work fairly with those communities and those parts of the world that are still suffering the consequences of our enrichment at their expense.