That's completely false.

Tibet was part of China since at least the 17th century. After the fall of the Qing, countless little warlord states sprung up all over China, including Tibet. For some reason, some Westerners decided that one of those warlord states was legitimate. Don't know why you never talk about all the other ones.

I say some Westerners, because the only state that ever actually recognized Tibet as independent was Mongolia. The US fully supported Chinese claims over Tibet before the communists won, and never recognized it as independent even afterwards, nor has any other country. Even Taiwan claims, and has always claimed, Tibet as a part of China.

But you don't know shit about that. You saw a slogan saying "Free Tibet!" and latched onto it with zero knowledge of the actual history, because it sounded nice and China Bad (those "yellows!")

I'll tell you what doesn't sound so nice: Being forced to work to death and dying at 30. Which is exactly how things were in Tibet before the revolution reached their region. Under Communist leadership, the government poured resources into it and other poor remote regions and doubled the life expectancy. By any objective metric, quality of life greatly improved in Tibet once people were liberated from living in serfdom under, again, a literal theocracy.

By contrast, Texas had only been part of the US for 16 years when they tried to secede to maintain their system of slavery. Not that it really matters, but 16 years is a hell of lot flimsier than 200+ years in terms of sovereignty. What does really matter is the absolutely deplorable, unforgivable conditions that the lamas (and the Confederate slavers) kept the people in, which again, you don't know shit about, because you didn't do your goddamn homework.

This is what you're defending in your ignorance.