If a foreign country has a problem with the way the U.S. government is treating them in an international body like the United Nations, the proper venue to address this is through our U.N. ambassador, or the White House.
At the time, the White House and Presidency were usurped and held by US enemies. The WH was occupied by essentially a foreign power. Israel was backed into a corner with harsh fundamental changes lurking.
Hat-tip to Bibi, Trump transition and Russia.