I found the OP rather silly. If anything, the Brits had the most barbaric of all Empires, in a civilized kinda way. They conquered more territory and people than just about anybody in history. But like their royal family, none of their shyte stinks. If it wasn't for Monty Python, I would have completely written off the Brits a long time ago - arrogant little pecker heads!
Oops! I am one of them. Crap!
But...places that they have colonized have generally had peace and many of the commonwealth countries have done and are doing well. I'll take Canada over the US any day... Austalia over Brazil... The Bahamas over the Dominican Republic.
As for the natives, I doubt that more than a handful would want things as they were. It's part of the victim culture that is becoming so prevalent. I pity people that focus too much on the past at the expense of a bright and promising future.