Thousands of Muslims from around the world converged on the UK for a convention where they rejected extremism and violence of terror groups such as Isis. More than 30,000 members of the Ahmadiyya Islamic movement met at Oakland Farm in Hampshire for a three-day convention, the 50th time the annual event has taken place. On the final day, attendees were led by the global Caliph of the movement in a vow of peace and and…