US special envoy Amos Hochstein is scheduled to arrive in Beirut on Wednesday, according to Lebanese government sources, on a crucial visit to de-escalate tensions between Israel and Lebanon’s Hezbollah movement. The pro-Iranian Hezbollah organization has sworn revenge after Israel killed its military commander Fuad Shukr in Beirut two weeks ago. A large-scale barrage by Hezbollah on Israel, perhaps in coordination with an attack by Iran, has been expected for days. Shukr was killed hours before Ismail Haniyeh, chief of the Palestinian militant group Hamas, was killed in Tehran on July 31. Isr…