“At present, the lede and the overall presentation state, in Wikipedia’s voice, that Israel is committing genocide, although that claim is highly contested,” Wales said. He added that a “neutral approach would begin with a formulation such as: ‘Multiple governments, NGOs, and legal bodies have described or rejected the characterization of Israel’s actions in Gaza as genocide.’” Currently, the article bases its position that a genocide exists on conclusions from United Nations investigations, the International Association of Genocide Scholars, and “multiple human rights groups,” among others.
This the exact rationale used by climate deniers. Because you can state that there is “controversy” over an issue, you can dismiss it entirely.
The consensus is that Isreal is committing a genocide. Those who are disagree are a tiny minority, and should be considered nothing more than outliers. It doesn’t matter that some of the disagreement comes from nations like the US. They’re not more right just because they have a big economy and military.
As you said, “Wikipedia’s job is to describe historical and scientific consensus”, and that’s exactly the responsibility that they’re shirking here, choosing instead to gesture at a barely existent “controversy” that basically consists of “Isreal and their allies refute the claim.” By the same token we shouldn’t call Trump a felon because he still insists he’s innocent.