To my readings, Tibet was conquerred by Mogol-China hybrid dynasty in the 13th century and then repeated invaded by Manchuria-China hybrid system in the 17-19th centuries until finally annexed by PRC in the 1950s. Invasion is a necessity for civilization advancedment. Without invasion, Australia does not exist. I generally encourage invasion and genocide for the good purpose of human advacement. China's invasion of Tibet is a good example of that kind of civilization uplift. By the way, Tibet repeatedly invaded China in the 9th centuries with massacres in their capital as well. That kind of purely destructive invasion should be prevented.
