No tension appears upon his face. He smiles on occasion in response to policemen who address him, here at the holding cell of the central police office, where he has been for the past two weeks. That's Ja'far Umar Thalib, the hard-line Islamic figure who calls himself Commander of the Laskar Jihad paramilitary force. This figure, who often wears a long white robe, is charged with creating civil unrest and ingniting hatred in Ambon. Ja'far is