"Highly contested" but not by genocide scholars or international law bodies.
Every genocide is contested by the people doing it and its apologists. Let's imagine someone commented on the holocaust wikipedia page:
> I assume good faith of everyone who has worked on this Holocaust "genocide" article. At present, the lede and the overall presentation state, in Wikipedia’s voice, that Nazi Germany committed genocide, although that claim is highly contested.
This would rightly trigger a lot of outrage. Yes, it's also accurate to say that it's "highly contested". Honestly this really highlights issues with striving for "neutrality", when there is bias in the people defining what neutrality is.