The Metropolitan Opera in New York City is hardly a site for hundreds of angry protesters. But they have erupted over their current selection, an opera called "The Death of Klinghoffer." Leon Klinghoffer was the 69-year-old paralyzed New Yorker who in 1985 was aboard the hijacked cruise ship Achille Lauro, then executed by Islamic terrorists because he was a Jew. The terrorists forced the ship's barber and a waiter to throw his body and his wheelchair overboard off the coast of Egypt. Klinghoffer's daughters, Lisa and Ilsa, have objected to this opera for decades. In the Israeli newspaper Haaretz, they...