After another flare-up of public protests, the Iranian establishment is working to mend internal rifts that have broken into the open as it faces greater pressure than at any point since the 1979 Islamic Revolution. Amid popular anger over the Iranian military’s initial attempt to conceal its accidental Jan. 8 shooting down of a Ukrainian passenger jet, the government publicly blamed the armed forces for withholding information about the crash for three days. The downing occurred as Iran’s air defenses were on high alert hours…