Lol finally some different news here, I'll bite.
None of this is exactly new. If anything it makes Beijing look better against all the claims of genocide happening. The content is quite interesting since there are few chances to see what Xi really thinks and the article is surprising balanced. Read through most of it both in English and Chinese, took awhile with my skills but the translation is reasonable if a bit rigid.
Anyway it is not like China has denied that these places exist. It is also pointless to condemn without providing a better solution. Not every country has the same luxury as the good ol' USA to sit across two oceans and drop bombs from afar. Look at whats going on in France... Also it is a huge stretch to think that Islamic countries will care about this leak. Heck even Al Jazeera hasn't picked up the story yet. The leak made it as clear as you can be that it isn't about Islam as a whole and nearly all the countries in the Islamic world has some sort of problem with local extremism.