Re: Who could possibly be behind this ...
Manolo,
There isn't really a grain of truth in it, because it's 99% conspiratorial bollocks.
Sure there are Uyghur islamist terrorists. As there are islamist terrorists from Europe, North Africa, the US, Saudi, wherever. It's a global movement. In the particular case of the Uyghurs, the Chinese government's repression of them as an ethnic / linguistic / cultural group came first though, as it's been going on for decades - along with the Chinese Communist Party repressing various other ethnic / linguistic / cultural groups (not to mention everyone else in China too).
Chinese repression predates the existence of Islamic State, although I don't know the history of Chinese repression, as to whether it also precedes al Qaeda (whose roots go back into the 90s - maybe late 80s). There may be more Uyghur terrorists than other groups, I've seen no data, but also there's been a general rise in the reach of islamist terrorism in Central Asia as a whole. Islamic State seem to have been very effective in the area, in a way that al Qaeda weren't, although they had links to Chechen groups - as well as Afghanistan of course.
Also the CIA didn't create the Taleban. In fact it's almost the opposite. The CIA, and other Western countries, did support the Afghan insurgents fighting the Soviet invasion in 1979 - and of course Osama bin Laden was one of those fighters. But the Taleban were formed after the Soviet withdrawal as a reaction against the warlords running the place (sort of) - a lot of whom were also mujahideen (also therefore backed somewhat by the CIA during the war). The Taleban were a reaction to the chaos and misrule of people you might equally claim the "CIA created". They conquered the country in the 90s - but were so repressive that Afghan society then reacted against them, and so they were in the process of losing control of Kabul to the "Northern Alliance" (some of those same "warlords") back in 2001 before bin Laden attacked the World Trade Centre and so the US joined in with a few air-strikes and special forces and the Taleban government collapsed almost immediately.
It's complicated.