Some 2,300 people joined a demonstration called by the Islamist group Muslim Interaktiv in the northern German port city of Hamburg on Saturday, according to police estimates, after the rally only got the go-ahead from authorities under strict conditions. The demonstrators gathered in the city’s Sankt Georg district near the central railway station on Saturday afternoon amid a heavy police presence. Most of the participants were men, according to a dpa reporter at the scene. The protest comes after more than 1,000 people attended a rally in Hamburg called by Muslim Interaktiv last month which …