Where would you argue a war exists today that does not have its roots in the economic domination of one group over another, and is purely fought on religious grounds?
Crusades, ISIS, the depression of the muslim Uyghur by China,
European antisemitism (which culminated in nazism), Armenian genocide, etc etc. Now many atrocities had several factors, but I believe religion plays a dominant role in the ones I listed. Arguably you can put 11-9 and the subsiquent mid east war in there as well...
This is not a religious conflict. China has oppressed the Uighurs because the Xinjiang region was only brought under full Chinese control late, and the Uighurs have been relatively independent-minded.
That this conflict isn't about Islam per se is evident from the fact that 1) there is a substantial Muslim population within China outside of Xinjiang, and those Muslims have not been given the same brutal treatment, and 2) there have also been secularist voices of resistance among the Uighurs to Chinese control of Xinjiang.