The employers of an American man killed while working in Yemen said in a statement Monday that he “highly respected” Islam, after a group tied to al-Qaida claimed it had executed him because of his “Christian proselytizing.” Joel Shrum, a teacher at the International Training Development Center, was shot dead Sunday in the city of Taiz where he worked. A group linked to al-Qaida, Ansar al-Sharia (Partisans of Islamic Law), claimed responsibility. "This operation comes as a response to the campaign of Christian proselytizing that the West has launched against Muslims," an unidentified person said in a text message to...