A group of “useful idiots” at the United Nations accused Israel of committing war crimes rather than hold terrorist groups responsible for using human shields in recent protests, a prominent Republican senator argued Monday.

Texas Sen. Ted Cruz delivered that rebuke hours after a commission appointed by the United Nations Human Rights Council reported that Israeli forces “killed and gravely injured” dozens of civilians over a nine-month period last year. The clashes arose form protests against the relocation of the U.S. Embassy to Jerusalem, as President Trump’s decision inspired a “Great March of Return” by thousands of Palestinians who sought to breach a border fence between Israel and Gaza. The most intense confrontations took place on the day of the Jerusalem embassy opening, which resulted in a U.N. rebuke.