I’ll name the war crime, and you could too if you did a google search for it.

We’re bound by the geneva conventions, that we did sign, and the articles regarding complicity in genocide wre in the signed articles. So yes, it is US law.

"According to Article 1 of the Genocide Convention, the Contracting Parties, including the United States and Israel, must prevent and punish acts of genocide. Under Article III, those punishable acts include “Complicity in genocide,” such as by knowingly providing the deadly weapons used to carry it out. In 2007, the International Court of Justice (ICJ), in a case involving Bosnia and Serbia, established that the obligation to refrain from providing weapons or other assistance begins the moment a state becomes aware of the existence of a serious risk that genocide may be committed.

For the Biden administration, that moment came in January, when the ICJ found that there was a “plausible” risk of genocide being committed in Gaza against the Palestinian people by Israel."

https://www.thenation.com/article/world/biden-complicity-genocide/