Or maybe genocide and "re-education" camps are bad, no matter the context.

Of course. But it is also important to verify such claims -- especially coming from sources with a tremendous conflict of interest -- and not presume guilt.

Or do we suspend justice when we perceive a party to be the current Big Bad?

Is that an argument against "don't believe what people claim about Chinese abuse of Muslims in Xinjiang" or against "don't believe claims that China is just defending itself against Muslim terrorists, supported by foreign imperialists, in Xinjiang", or both?

My argument is literally as stated. Verify media claims and come to your own conclusions. Be aware of what interests are at play and be skeptical of them.