and doesn't all this depend on how what you consider a country? hasn't Wales been colonized by the English for a long time or does some geographic separation have to exist?
And is colonization of Korea during ww2 less destructive than the British colonization of Hong Kong? Or does the colonizer matter?
Since you've simply flat-out contradicted a research paper with nothing more than assertion, I find it unlikely your upvotes represent anything more than a set of people who found their preconceptions tickled by your post. Do you have any sort of actual other study to back you point up, or are you just stating your own biases?
(I don't feel much like I have a horse in the "colonization is evil" fight, since I think anyone still personally offended by events from over, say, 150 years ago already has problems I can't solve. But the question of why cultures succeed and fail is one of the most pressing questions the human race faces and having it muddied up by stupid political games is costing lives.)