The doctrine of colonialism states quite clearly if you occupy a place for some reason and the natives get in your way kill them. But you don’t kill so many that a market can’t be established for your goods.
So Tolik if you let them kill each other they develop resistence and want their own government. That theory worked in the past but now with new technology like Swiss bank accounts they just take the money and run.
The more things change, the more they stay the same.