I think while individual attitudes can change if people make the chose majority populations around the world still elect and turn a blind eye to public policies that put assimilation pressure on indigenous populations, like the Samis of Sweden to loose their traditional lifestyles. It their case the tradition of nomadic herding was lost when they were forced into stationary herding. Loosing a lifestyle means loosing a livelihood bringing desease and poverty in their place.

Add to that for the Samis like the Inuit of Canada now they also face the effects of global warming which is altering the very lands they call home.

Expanding on this thread being about one person's feelings of guilt for South Africa's aparthied policies as part of the larger effort of global cultural genocide I think that the complacency that allows people to think these sorts of things are in our past is just as appauling as the colonization process that systematically continues to dehumanize and extinquish indigenous peoples and traditional cultures.

If guilt can motivate someone to challenge public policies that continue to discriminatate and marginalize people than I applaud people for having a heart for justice. Guilt can be used for good if it causes people to choose to make their world a better place tomorrow even if others made shameful choices yesterday. Seldom though will people give up the advantages that colonization aka assimilation provides for the non indigenous immigrant colonizer.