And when Mr Barak's otherwise big concessions stopped short of yielding Palestinian sovereignty over Jerusalem's Haram al-Sharif, where the great mosques stand, Arafat got the pretext he needed.
The BBC's Middle East correspondent, Paul Wood, says the call by some Palestinian officials for people to defend the Haram al-Sharif or Temple Mount, site of the al-Aqsa mosque, comes amid rumours of plans by Jewish extremists to take control of the area.