Germany’s police union has said police are “fed up” of studies into racism in the force, in the latest salvo of a row over a university survey. Out of Germany’s 16 federal states, police in two states have refused to take part in the study: Baden-Württemberg and Hamburg. National Police Union leader Rainer Wendt said on Tuesday he completely understood the objections of the Baden-Württemberg force. Members are not there to carry out the will of politicians, he told dpa. Besides, he said, there were grave doubts about the independence of the study by the Police University in Münster. “The polic…