For President Trump and for Prime Minister Benjamin Netanyahu of Israel, the recognition of world heritage sites in the Palestinian territories, like Hebron and the Church of the Nativity in Bethlehem, and the 2015 resolution and another in 2016, showed an anti-Israel bias.
Earlier on Thursday, the United States formally notified the United Nations Educational, Scientific and Cultural Organization (UNESCO) that it would withdraw from the organization on December 31, 2018.
Washington has also protested against UNESCO's decision to grant full membership to Palestine, deciding to suspend regular payments to the organization in 2011. It cited US belief in "the need for fundamental reform in the organization".
Mr Netanyahu said on Thursday that Israel will also withdraw from the agency, which had become a "theatre of the absurd because instead of preserving history, it distorts it".
The organization has voted through several decision that have enraged Israel, particularly resolutions that appear to downplay or omit the importance of holy sites in Jerusalem and West Bank to Judaism.
Israel also should kick all UNESCO staff out and close its offices.
Secretary of State Rex Tillerson delivered official notification of the plans for withdrawal to UNESCO Director-General Irina Bokova, who expressed "profound regret" at the move. As Foreign Policy magazine points out, the US chose to pull out of the agency in 1984 during the Reagan administration, which at that time complained of - in the words of Foreign Policy - "corruption and what it considered an ideological tilt toward the Soviet Union against the West". The officials, who were not authorized to be publicly named discussing the issue, said the USA was notably angry over UNESCO resolutions denying Jewish connections to holy sites and references to Israel as an occupying power.
The United States and Israel announced on Thursday they were quitting the U.N.'s cultural agency UNESCO, after Washington accused it of anti-Israeli bias.
Many saw the 2011 UNESCO vote to include Palestine as evidence of long-running, ingrained anti-Israel bias within the United Nations, where Israel and its allies are far outnumbered by Arab countries and their supporters.
The agency is known for designating world heritage sites such as Syria's Palmyra and the US Grand Canyon. "It's not just about money, it's promoting ideals that are vital to countries like the United States, such as education and culture", a UNESCO-based diplomat said, warning that others could follow.
Michael Worbs, chairman of the UNESCO Executive Board, appreciated the Vietnamese' notable jump in the second round. France's U.N. ambassador, Francois Delattre, had urged the United States to remain in UNESCO this week, saying the United States "must stay committed to world affairs".