CHINO, Calif.—This week, thousands of families arrayed in their colorful best are crowding into a sprawling mosque set among the golden hills of this old agricultural community east of Los Angeles. Some have come from across the country, and some from as far as Ghana. A few even risked travel out of Syria. They clamor to see Mirza Masroor Ahmad, a subdued, 62-year-old former wheat farmer and the world’s only “Muslim Pope.” The khalifa, as he is called, is the …
