I am a Federalist, not a Nationalist. I believe in localized governments and the Federation of the States rather than an all powerfull centralized Nationalized government. I am for State rights and the 10th Amendment as intended. https://www.americanthinker.com/articles/2016/04/nationalism_versus_federalism.html
You and I are mostly on the same page. When I say nationalist, it is in contrast to globalist. I care more about the people who I consider members of my nation, than those who are not part of my nation.
To the globalist, it is immoral to care more about your own family than about some third world stranger.