These weak efforts at portraying the occupation and colonization of Tibet, as anything else, are rather sad. Just take a poll of Tibetans and see how many would like the Chinese to just leave. It would be like asking the Indian nations in North America how many wish the white man never came. You would not get too many dissenting votes.
You're equivocating. Occupation and colonization have specific definitions, which your putative poll does nothing to address. You could make the same poll of, say, the Komi in Russia, the Hungarians of Transylvania, or the Basques in Spain, and get the same result. Yet it would be incorrect to say that Russia is "occupying" the Urals, Romania is "occupying" Transylvania, or Spain is "occupying" the Basque country. Nor, for that matter, is it correct to say that the United States of America is "occupying" North America.
More to the point, there are unambiguous examples of occupation and colonization, and Tibet is not one of them. From the Chinese point of view, Tibet is a backward border province that tends to break off during times of weakness and get reabsorbed during times of ascendancy. They have a claim to the territory that's at least as legitimate as, say, the French claim to Alsace or the Danish claim to Greenland -- neither of which are seriously under dispute by anyone.
This is my problem with loaded terms like this. Calling the Tibetan question "occupation" and "colonization" closes the door on most things that could actually work -- the only morally acceptable solution to occupation is that the occupier leaves, right?
The history of China and Tibet is far more complex than the simple narrative of the idyllic Shangri-La mountain kingdom brutally taken over by the Communist hordes. Tibet under the Dalai Lamas was *not* a very nice place to live, unless you happened to be a rich landowner or a monk in a rich lamasery who really, really likes meditation. That means that any resolution to it will be more complex than simply having the brutal Communist hordes leave. (Who's gonna make 'em do that, anyway?)
Even Dalai Lama accepts this. He's not disputing Chinese sovereignty over Tibet; he's opposing the discrimination and nationality-based oppression the Chinese are perpetrating there. That, not your "occupation," is the problem -- and it's a soluble problem. China is being a bleedin' idiot for not talking to Dalai Lama (a bit like America was a bleedin' idiot for not talking to the Iranian president back when they had a sane one), but that's rather different from just being the "occupier" and "colonizer" and insisting that everyone pout and stamp their foot at them until they up sticks and leave.