The way China is suppressing Tibet and its culture is well known. Just as the way it is trying to assimilate its population by the way of promoting massive immigration from China. Unfortunately there are many other countries trying to assimilate minorities.
What makes China unique is that it is pressing for the annexation of Tawang under the pretext that it is Tibetan and Tibet is part of China. It means that China is pressing for the acquisition of more territory with the intent of erasing its culture and marginalizing its population. How barbarian can you get?