DEBKAfile's Palestinian sources report extremist PLO politburo chief Farouk Kaddoumi is challenging legitimacy of interim regime. He claims he is rightful PLO chairman after Arafat's death — not Abbas. Self-exiled in protest against 1993 Oslo Peace accords, Kaddoumi is promised Hizballah support for a fresh wave of terrorist violence starting during Arafat funeral. Hizballah chairman Hassan Nasrallah schedules an inflammatory speech to mark event. Last Friday, Kaddoumi forwarded funds to Fatah-Tanzim's al Aqsa Martyrs Brigades for mob clashes with Israeli troops and spectacular terrorist attacks. His supporters in Ramallah PLO, Hani al Hassan, Azzem Ahmed, Abbas Zaki and Saher Habash, have failed to broker an amicable arrangement with Abbas.Let the bloodbath begin.