Earlier quoted context omitted.
The standard operating procedure of the British Empire was "divide and conquer". In order to rule a minority was usually put in a privileged position. It should be no surprise to anyone that when the British left things often become a mess as the minority tries to hold onto power and those previously excluded fight to gain power.
This was also how the Romans did it, and a thousand years later, everyone agrees that the Roman legacy was a net good. Same is true, and will be said, of the British empire.
Our judgement of the Roman / british legacy is subject to
"Survivor Bias". If you can't see the cost paid by those who did not survive then things will look much better !