Campaigns for and against new mosques cities have become defining issues in local politics across the U.S. and Europe, each controversy measuring how well Muslims have integrated into those communities, writes the Economist. The content of the controversies in cities including Boston, Rome, and London varies widely, the Economist says. In the U.S., objections tend to focus on practical considerations like parking and zoning laws. Those objections are usually overcome. A mosque in Chicago successfully challenged a regulation that banned parking for three hours on Friday afternoons, when worshipers would be arriving. Read the rest.