80% of Arunachal was under the Ahoms in the past, how can China claim all of Arunachal?
As for the western parts( (read tawang region) and the anini-mechuka region, we had our own kings like the Bhutanese. We are more similar to Bhutanese than Tibetans. It is true that tibetan buddhism is practised in the region and tibet have had a great influence on us but that goes for entire himalayan region.
What did you mean by "We are more similar to Bhutanese than Tibetans"? Are you a tribal from NE? As for the Bhutanese, my little knowledge tells me that the Bhutanese used to call themselves Drukpa which means Dragon People. I personally don't see any difference between Bhutanese and Tibetans, they look identical with each other, may be culturally different.