Just felt like mentioning that something similar happened in Austria some years ago, especially in Carinthia, where Haider's parties (he later founded his own one), which had always been against immigration, against joining the EU and against Slavic minorities in the country, managed to get pretty popular.
I'm personally still kind of torn on the issue of nationalist views in the context of neutral countries. Restricting immigration and [URL=
http://en.wikipedia.org/wiki/Protectionism]other imports[/URL] are generally smart things to do if you can't compete economically with other countries (f.e. if their people do the same jobs for less money or if cheap imports could harm national enterprises) and you don't want to get too co-dependant on them. Strong co-dependancy kind of stands in conflict with the notion of neutrality, so I see the point of such movements. Unfortunately, at least in Austria, I guess the parties in question really overdid it and were way too radical, probably to appeal to racist voters at the same time.