There is nationalism: "our people are cooler, let's favour them, maybe we'll make it harder for others but we don't care", so there are legit parties with that views: conservators, protectionists, socialists (I don't refer to specific parties or movements, just a general inclination). I don't like them that much, but we shouldn't judge opinions, it's better to promote our own.
And there's nazism, which usually refers to an ideology like Hitler's: "yes, we are better, so let's kill everyone else or make them slaves", this is just pure evil, I leave it unexplained because it's really obvious.