I am unable to subscribe to this idea of Chinese invasion into East Turkistan. East Turkistan was a self proclaimed regime which was made out of China in 1933 and survived less than five years after that.
Tibet, in its own accord is China's old region. Everyone knows from where the Buddhism started.
Though, on the other hand, when I hear the same hue and cry for the such regions like by TTP for PATA, Kurdistan in the regions of Turkey and Iraq and East Turkestan in China, I tend to wonder about the old state of Prussia and the lost state of Hyderabad & Deccan. Would they also have the same fate of support?