I agree that what I’m reading in the news are war crimes. That’s not my point. Working for the government, I’d assume you understand that POTUS oversees the Executive Branch, and only considers intelligence provided by the State Department. Not the news, or protesters, the UN, the ICC, or the ICJ, but US intelligence.
The other branch of consideration is the Legislative Branch, and Congress has already voted in favor of support legislation. Without the State Department or Congress recommending amendment of support, deviating from advisement would make Biden liable to challenge from the Judiciary Branch in the form of an impeachment hearing for acting in bad faith.