We should financially apologize for the atrocities and lift people up like you suggest, but that’s not what gentrification means. The other commenter was right. Gentrification means upgrading an area and displacing those who live there.
gentrification jĕn″trə-fĭ-kā′shən noun
The restoration and upgrading of deteriorated urban property by middle-class or affluent people, often resulting in displacement of lower-income people.
The process of renewal and rebuilding accompanying the influx of middle class or affluent people into deteriorating areas that often displaces earlier usually poorer residents.
The restoration of run-down urban areas by the middle class (resulting in the displacement of low-income residents).