No, it isn't. From the article: > It has forcibly sterilised some Uyghur women. But it is not slaughtering them. Not slaughtering them makes no difference to whether it's genocide. Genocide is about "intent to destroy in whole or in part a national, ethnic, racial or religious group". Sterilizing them counts. As would snatching the children of that group and placing them in families of your own group (to give an exam…
In terms of the definition adopted in various official contexts this is obviously correct. But the problem is in terms of discourse "genocide" has a much more specific connotation for most of the public and it's all too easy to (deliberately or not) to conflate the two things - making the issue harder to discuss.
If you'll forgive a controversial analogy - it's like the term sexual assault. Clearly sexual assault in legal terms has to include unwanted sexual touching of any degree. No doubt. But if I say "I am a sexual assault survivor" then this inevitably conjures up images very different to the truth (which is : my bum was pinched a few times in nightclubs two decades ago). In the case of sexual assault modifiers like "serious" or "minor" get used because clearly there is a big range of possibilities here. And although my experience was sexual assault, it's intellectually dishonest for me to put it like that (at least not without heavy explanation).
Similarly with genocide, if (to use your least severe hypothetical example) the only issue was an above average number of children from one ethnic group being taken into care and placed with foster families of another ethnic group then it would feel dishonest to say (in public discussions) that that was a genocide (by itself). (Note : That is NOT what is happening here, I am merely responding to your example)
I don't know enough about the Uyghur situation to say myself but maybe "genocidal practices" might be more appropriate, I don't know. It feels poor taste to call anything "a minor genocide".