True, but some have Arabized those names, some have not. More of the detainees seem to have done so than the other Uyghurs on that page.
However while most Uyghurs are Muslim, not all Chinese Muslims are Uyghurs. Some are even Han.
Time will tell. All we can say now is that this guy's actions resemble those of a member of the ROP who gets SJS.
Time will indeed tell, but after seeing the contortions some people went through here to put the Virginia Tech shooter into that basket, along with every other lunatic who has gone on a killing spree in the western world over the last seven years, only to have them almost all turn out to be regular old homicidal lunatics, I'll put my money on that turning out to be the case here, as well.