Last year, on International Holocaust Remembrance Day, Mohammad al-Issa, in his capacity as secretary-general of the Muslim World League, wrote an unprecedented open letter to the director of the U.S. Holocaust Memorial Museum expressing Muslim sympathy for the victims of the Holocaust. The following May, Issa—formerly Saudi Arabia’s justice minister—made a historic visit to the museum. Marking this year’s Holocaust Remembrance Day, which fell on Sunday, he writes:

According to the Lebanese government, the explosion in its capital city on Tuesday that left over 100 dead and many more injured or homeless was caused by the accidental detonation of some 2,750 of ammonium nitrate, a fertilizer often used for making bombs. (Less than one-thousandth of that amount was used by Timothy McVeigh to destroy the Oklahoma City federal building in 1995.) Previously, police have discovered Hizballah warehouses in London and Germany storing many tons of the same explosive. Hussein Ibish comments: