Old Jules, what do you think are the responsibilities of the U.S. when faced with strong evidence of genocide?
Despite a lot of hand wringing and rhetoric to the contrary, the US traditionally doesn’t interest itself in genocides and does nothing to prevent them unless they happen to already be at war with the perpetrator. Tradition is the determinant since there’s no cause to believe otherwise.
As a practical matter it’s demonstrated with the Armenians, the Ukrainians, the Kurds, the Biafrans, the Cambodians, the French death camps in the Caribbean prior to WWII, anywhere besides Germany. The relatively recent Israeli participation in a mass killing in Lebanon is no exception.
If you can find an exception to this you’ll have yourself a unique piece of detective work.