Tibetan history, like Chinese history, is complicated. On the subject of Tibetan assimilation: what most people think of Tibet - that is the current Tibetan autonomous region of the PRC - is actually only about 1/3 of what many Tibetans would call "Tibet." What is culturally and ethnically Tibetan actually stretches across Qinghai province, as well as large swaths of Sichuan, and part of Yunnan and Gansu. If you go t…
"What is culturally and ethnically Mongolian actually stretches across the Middle East, as well as large swaths of Russia and Europe." It simply isn't feasible to grant every cultural group the full extent of their historical claims.
Doing this will extinguish multiple continents...