A national furor over Islam has touched down in the heart of North Texas, where Irving’s mayor has accused mosque leaders of creating separate laws for Muslims, and requested a City Council vote this evening to endorse a state bill that Muslims say targets their faith. The dispute has made Mayor Beth Van Duyne a hero among a fringe movement that believes Muslims — a tiny fraction of the U.S. population — are plotting to take over American culture and courts. “It fuels anti-Islamic hysteria,” said Zia Sheikh, the Islamic Center of Irving’s imam. “Her whole point was to rile...