More than 10,000 people took to the streets of Cologne on Tuesday to protest against the far-right party Alternative for Germany (AfD). The area around Heumarkt in the centre of Germany’s fourth biggest city was “completely packed,” a police spokesman said. The AfD, which reminds some Germans of the Nazi regime, has been gaining support in national and regional opinion polls and could emerge as the largest party in three state elections in the former East Germany in September. But recent revelations that AfD officials were reportedly at a far-right meeting in November with a group advocating t…