In the largest pro-Saddam demonstration to date, some 3,000 protesters marched through the Jordanian capital on Friday to lash out at American and Shi'ite Muslim influence in the Arab world. The protesters, mostly from Sunni Muslim or leftist opposition groups, accused Iran of being involved in the hasty hanging of the former Iraqi dictator, who was executed Saturday in Baghdad. "Death to America and to Iran," shouted the crowd, who marched from a mosque in down town Amman after the noon prayers, bearing portraits of Saddam and waving the Iraqi flag.