Why is the Biden administration funding a UN agency it deems 'unacceptable'?

In the diplomatic understatement of the year, U.S. Ambassador to Israel Tom Nides stated last month that the United Nations Relief and Works Agency for Palestine Refugees in the Near East, the U.N. body tasked with helping so-called Palestinian refugees, “has serious flaws.” Then, during a March 1 hearing on Capitol Hill, Ambassador to the U.N. Linda Thomas-Greenfield asserted that the proven misuse of UNRWA facilities for terroristic purposes “is absolutely unacceptable.”