Immediately after the historic ceremony on the South Lawn of the White House on Tuesday, about 100 Orthodox Jews went to one corner of the lawn to pray the traditional Jewish afternoon prayers. One of them wore a tallit (prayer shawl). Next to them stood a Muslim diplomat from the United Arab Emirates (UAE), and she took a selfie!

It was one of my highlights of the day, though it came after the moving ceremony in which US President Donald Trump, Prime Minister Benjamin Netanyahu, UAE Foreign Minister Abdullah Ben-Zayed and Bahrain Foreign Minister Abd al-Latif al-Ziani all signed the Abraham Accords and individual agreements between Israel and the two Arab states. The Accords are expected to regulate the political and economic relations between the countries, which in recent decades have maintained only informal ties.

During the evening, Trump announced that at least five more Muslim countries will establish diplomatic relations with Israel in the near future. The next country is probably Oman, followed by (not necessarily in this order) Sudan and Morocco. Yossi Cohen, head of the Israeli...