Nationalism by itself is probably one of the most demonized ideologies nowadays, when It's actually one of the most basic ethical views that people should have. A lot of nationalists think that the nation itself should be unified under a King, Religion or Race/Identity but as a contrast to this all the other ideologies tend to lean much more towards libertarianism and irresponsibility towards your own people. Each group is isolated from each other and they stop opposing the government in a more serious fashion.

I sure as hell support legit nationalist groups and politicians, but I don't trust most political figures nowadays for obvious reasons.