Even if the international courts don’t rule that Israel is committing genocide, that will necessarily have been influenced by the United States’s close ties to Israel, so that they haven’t yet said whether it is or isn’t genocide is irrelevant. According to the evidence we have, it is.
Others, like historian Gary Anderson, contend that genocide does not accurately characterize any aspect of American history, suggesting instead that ethnic cleansing is a more appropriate term.
I’ve seen that same statement by people opposed to the use of the word “genocide” when talking about Israel’s genocide of Palestine, and it’s just as credible there as when “historian Gary Anderson” said it. At best, such a stance is pedantic; at worst, it supports Israel’s genocide by denying and enabling it.