Germany is far more conservative than the US in many ways. Many people mistake controlling every single part of your nations economy for liberalism - it isn't. Most of Europe is, in fact, except for the Scandanavian nations which are the bastion of liberalism in the world.
But these guys are only getting about 6% of the seates - just barely above the threshold. They aren't going to have any part any government at all. Germans and most Europeans simply carry that irrational immigrant hate to a ridiculous level. The NDP, if the political compass I'm looking at is correct, is actually more left than the social democrats in economics, but they're stuck way at the top in the area of authoritarianism. Right next to hitler, actually...