To answer your question, I'm not happy to see any violence, but as someone who has some humility, and pragmatism, I don't see how more oppression can solve the problem of violence. For the Uyghurs, they view what they do as self defense, just like the Chinese, is self defense wrong? Some would argue only if the force used is not proportional to the offense sustained. For over a century, Chinese of various factions have invaded and massacred tens of thousands of Uyghurs in the region under different pretexts, what exactly can you expect from an ethnic group fighting for their very own survival?

A seed of distrust and paranoia was sown and was allowed to grow. That does not mean it has any basis in fact.

You should also look at how the Chinese government has oppressed the Uyghurs (and Tibetans and Taiwanese, to name a few).