A German businessman of Syrian descent who wanted to surprise his daughter with a holiday visit was detained for four days in a Las Vegas holding cell before being sent back home without explanation. A civil rights group called authorities’ treatment of Majed Shehadeh a case of anti-Muslim discrimination. Shehadeh, 62, flew from Frankfurt to Las Vegas last Thursday, hoping to meet with his wife and drive to Bakersfield, Calif., where his American-born daughter had just gotten news she’d passed the California bar exam. On Sunday, he was released and sent back to Frankfurt on the same charter airline. The detention follows a series of similar incidents involving Muslim passengers, according to the Council on American-Islamic Relations.