Video shows that terrorism knows no national borders
A sensational video purportedly by the Islamic State terrorist group, featuring an ethnic Uygur militant threatening to "shed blood like rivers" in attacks on Chinese targets, may or may not be what it was meant and believed to be, though some experts do see it as the "first", "direct" threat the terrorist organization has leveled against China.
But it justifies the Chinese government's worries regarding the seriousness of terrorist threats on home soil, given that some members of terrorist forces such as the East Turkestan Islamic Movement have been colluding with international terrorist organizations such as IS.
However, more often than not these concerns have met with denial and dismissal from the West: The most popular Western narrative of late being innocent Uygurs rebelling against Han-Chinese "repression".