Barber Mohammed Hamad was in no doubt about the reasons for Yasser Arafat’s death just under eight years ago. As he trimmed a customer’s hair in his shop in the Amari refugee camp yesterday, he welcomed the news that French prosecutors have opened a murder investigation. And he insisted that “99.9 per cent of people” in the city where the previous Palestinian President was confined in his sandbagged headquarters for the final two years of his life “believe Abu Ammar” – he uses Arafat’s nom de guerre – “was murdered, poisoned”.