Not that China needs to be contained anyway. The only worldwide threat to national security is the country with 800 military bases worldwide and a hundreds-of-years-long history of invading someone every few years.
That said, "non-governmental" and "non-U.S." coverage can be suprisingly illusory. Pay attention to the sources next time you see a Xinjiang story, whether in or out of the U.S., and report back if you find out that it ultimately sources someone other than Zenz (of course, make sure to do this recursively).
It's also worth pointing out that non-governmental organizations get their funding from somewhere, and, surprise, the places most critical of China tend to get their grants from sources that are ultimately government funds. The National Endowment for Democracy and Radio Free Asia are particularly infamous for distancing themselves from their government ties (Allen Weinstein, a founder of the former, famously said in a 1991 interview that "A lot of what we do today was done covertly 25 years ago by the CIA.").