Well there's nationalist as in valuing culture, history, borders, and society, while showing the same respect for every other nation, and then there's "hurr durr I'm superior to all"
Nothing wrong with being nationalist. You have an identity, an ethos, it works for you. If someone alien enters, adhere. Easy as. I've done this in multiple countries as a resident, Anoter 48 as a tourist.
Used to be having any concern at all about immigration and integration got you the Nazi stamp half a decade ago, people are too quick to judge, raising a controversial question does not imply support either way