An African-American man in his 30s has been arrested for setting a string of fires at black churches in St. Louis, the St. Louis Post-Dispatch is reporting. Speculation swirled that the fires were racially-motivated, especially given the proximity to Ferguson, Mo., the St. Louis suburb that was the site of massive protests last year over the police-involved shooting of Michael Brown, an 18-year-old black man. A white priest at St. Louis’ Christ Church Cathedral asserted that the arsonist had racist motives. “Holy God, if we ever needed a wake-up call to believe that racism is alive in St. Louis —...