some questions on tibet

Why is it that Tibetan protests get so much more attention abroad than the ones by Uyghurs in Xinjiang (where discontent with Chinese rule is at least as strong)?
If Tibet was a part of China at some point in history, does it mean it must remain one in future?
Aren't there maybe similar problems all over the region, with people from the overpopulated plains, from bigger ethnic groups, migrating to the mountains and marginalizing the "locals"... like in Bhutan, in Sikkim, from Bangladesh into Northeast India? What can be a fair solution for these cases?
And why indeed do people not talk about solutions?

There was an interesting article recently in Himal Southasian magazine, about possible ways to approach a solution to the Tibet crisis.