Mr. Putin and Mr. Trump are not alone. Mr. Netanyahu has recently been feted by Prime Minister Narendra Modi of India, President Xi Jinping of China, Prime Minister Shinzo Abe of Japan, as well as a host of leaders of smaller countries — including those with far-right governments like Hungary, Poland and Austria. No less significantly, he has maintained close contacts with President Abdel Fattah el-Sisi of Egypt and behind the scenes with the Arab leaders of the Persian Gulf.

Mr. Netanyahu is the toast of the new wave of right-wing, populist and autocrat-like (if not outright autocratic) leaders. They see in him a kindred spirit, even a mentor.