There were no laws here when the Europeans came over, so how was it illegal?
What alot of people don't understand about this whole situation is the fact that if it wasn't the Europeans who came here and setup shop first it was going to eventually be the Asians, Russians, MiddleEasterns, Hindus ect. ect. ect. instead. The natives were eventually going to get their shit taken at some point by someone, it just happened to be by the Europeans.
Its not the natives fault that they weren't with the times when they came over, hell the entire Americas were isolated from the rest of the world for a very long time and they weren't able to flourish as fast.