Nuuk has had its own closed prison for a while now, with inmates in Denmark given the option to transfer there. I don't know how many are still in Herstedvester but it can't be many and afaik they are not forced to stay there. Is this what you're referring to?
I'm not disputing the colonial history of Greenland/Denmark or the oppression inflicted on the Inuit (which didn't end in 1953) but I struggle to see the point you and the other poster are trying to make. You both seem to be making insinuations based on facts that are simply not true/up to date.