Donald Trump will insist in his first presidential speech addressing global 'Islamist extremism' that Muslim leaders must scare would-be terrorists into submission, warning them about the impact suicide bombings will have on their immortal souls. 'Religious leaders must make this absolutely clear: Barbarism will deliver you no glory – piety to evil will bring you no dignity,' Trump will say, according to excerpts the White House provided a few hours ahead of time. 'If you choose the path of terror, your life will be empty, your life will be brief, and your soul will be condemned.' Trump will insist that...