Apparently you need to read up on the White Lotus Rebellion against Qianlong. Try to remember that the colonization and port-extortion hadn't happened yet, that the Qing were at the apex of their power, and that the revolt failed to command widespread support primarily because it had no nationalistic appeal. Because that didn't exist at the time.Wrong.
Chinese was revolting against the Qing dynasty because of its incapability to lead the nation, made apparent by the fact that foreign imperialistic powers were able to colonize and extort ports from China.
And the fact that they were "revolting against an entirely separate ruling ethnic group" is a shining example of nationalism and a sense of nationality amongst the ethnic Chinese people.
So, why again do the Chinese get a claim to legitimate control of Tibet? Other than that it's spear-won?