Too many Islamic countries treat their Christian minorities as second-class citizens and bar them from building churches while Western states let their Muslims build mosques freely, according to a senior Vatican official. Cardinal Jean-Louis Tauran, who recently retired as the Vatican's foreign minister, told the French Catholic daily La Croix on Wednesday that Christianity and Islam faced "an enormous task" of learning to live together in mutual tolerance. Tauran was the latest and highest-ranking Catholic official to voice concern about Vatican relations with Muslims, an issue seen as central for whoever succeeds the ailing Pope John Paul. "There are too...