The US has committing war crimes on a regular basis, globally, practically since the word entered the vernacular.
Biden still hasn't closed Gitmo - a two decade running war crime - along with the rest of our torture prisons and black sites. He's blatantly violated international law via our looting of the Afghan Treasury, our terror bombing in Syria, Libya, Somalia, and Iraq, our mercenary kill squads sent into Mali, Yemen, Congo, Nigeria, and Haiti, and our illegal occupation from the the Philippines and Japan to Panama and Cuba.
And then there's Israel.
Biden's continued criminal misconduct dating back to the McKinley Administration. Its just within the scope of his office, so the SCOTUS thinks he's beyond prosecution.