I've almost never heard the descendants of colonised people be anything less than vehemently against colonialism. It was a dominatory invasion. Their remnants lie in museums like the Pitt Rivers.
Pillage, dispossession, dissolution... common descriptors in postcolonial places.
Yeah, I feel a bit mixed about it? Like, it depends heavily on the individual place that got colonized - wide variety in how shitty the colonizers were - and while original cultures were often suppressed, a lot of benefits came too (tech and medicine).