Okay. There have been various degrees and types of discontent among Uighurs on the ground in China over the course of history. There was a particular incident in the 1990s in a particular area of Xinjiang, which was related to access to religious freedom.
After the Cultural Revolution, during which of course religious freedom was greatly suppressed, there became a greater space for this. As part of a clash between what the authorities perceived as an overuse of religious freedom, the Uighurs responded with writing, to an extent. This also has employment ramifications.
Uighur activism has been portrayed as religious terrorism. More recently, this portrayal has an aspect of truth to it, because Uighurs, to an extent, were radicalized and influenced. Some went to Syria, and some swore to take revenge for what has been done to their people.
However, it is highly necessary to see all of this as part of a much bigger picture. There are various types of discontent among normal people on the ground in Xinjiang, and they have responded in very different ways. Some of them, of course, have responded with violence, not necessarily only religiously motivated, but also politically and economically motivated.
That would be a succinct answer to your question.
Beyond that I would say that it's not been my particular area of expertise to study in detail the nature of Uighur separatism.