LONDON - America's decision to bar the singer once known as Cat Stevens from the country for security reasons will damage U.S. ties with Muslims, his supporters said Wednesday. The musician-turned-peace activist, now named Yusuf Islam, is a well-respected member of Britain's Muslim community, Muslim organizations say, expressing bafflement at the U.S. contention that he is a threat to American security. "It is a slap in the face of sanity," said Mohammad Abdul Bari, deputy general secretary of the Muslim Council of Britain. "If prominent, well-known personalities are treated like this, then how can there be bridge building?" he asked....