India had a long history before British and may be before China. It was unified and it was broken into parts.
Similar to China, there were regions which were part of India. It extended up to parts of Iran. We never claim those parts. Most of the countries which were created recently by the British colonialist. It was mostly based on religions (India and China) or tribes (Africa).
Sikkim wasn't forced into India by anyone. It joined the Union as a result of political unrest. That too requested by PM of Sikkim.
If India was so expansionist, why didn't we force Bhutan or Nepal to the union, might as well as add Bangladesh to for extra credit.
What China did to Tibet is in no comparison with India. It was annexation. What it is doing in South China sea is the same expansionist mindset. China is just the bigger bully in the room.
Where did you get this 'India forcing Dalai Lama to speak something'. This is not how it works here. He once said, Arunachal Pradesh should become part of Tibet when it gets full autonomy. He is free to talk anything. Even if he publicly denounce India, doesn't make his life hard here.
If you don't know what caste system and slavery is don't drool out here. It's all half naked truth which you get when you skim through internet or wikipedia well whatever is not banned in China.
Chinese citizens are slaves to their own government we saw that during Tienanmen square massacre and the great famine, the cultural revolution, destroying 5000 year old tradition, betraying once own teacher and so on.
Now executing civilians for petty crimes. You guys took slavery to a whole new level.
Lastly tell me, if Tibetans are so happy living and 'spreading their religion' (which is banned in China) why Tibetan monks are self immolating. I read that they were required to fill in papers for re-incarnation LOL
Coming from an officially atheist government. What is wrong with you folks.