A veteran ally of Angela Merkel urged Muslims in Germany on Sunday to develop a “German Islam” based on liberalism and tolerance, saying the influx of people seeking refuge, many of them Muslims, is a challenge for mainstream society. Minister Wolfgang Schäuble, stepping out of his usual finance remit, urged tolerance, saying the arrival of hundreds of thousands of migrants required a better understanding among Germans of what is important to them and how they want to live. […] Schäuble, a stalwart of Merkel’s Christian Democrats (CDU), said: “Without a doubt, the growing number of Muslims in our country today...