Tens of thousands of people have taken to the streets in the northern German city of Hanover to protest against right-wing extremism, with similar rallies being held all across the country. Former German president Christian Wulff and the premier of the state of Lower Saxony, Stephan Weil, were among those addressing the protesters on Hanover’s Opera Square. Organizers put the number of participants at 35,000, saying this estimate was in accordance with police figures. The police were not initially available for comment. Protesters carried banners with slogans including “We are diverse” and “Fa…