IN A COOL side room at the rear of a packed auditorium at Central Hall Westminster, Dr Mustafa Barghouti, wearing a simple white shirt, sits quietly waiting his turn to take the stage.The occasion is the June 20 International Conference Against War, hosted and organised by the Stop The War Coalition. Barghouti is the last speaker of the session. When he eventually walks up to the dais, he is welcomed with the most prolonged standing ovation of the day.