What I mean by ethnic/linguistic nationalism, you can pitch religion in there if you like, is as opposed to what we might call territorial nationalism.
IOW, is an Iranian (or Persian) an inhabitant of the geographic territory known as Iran or Persia, or is he a member of the specific ethnic/linguistic that describes itself as Persian or Iranian, thereby excluding all other groups?
Don’t speak a word of Persian or Turkish, but I’m well aware they are from completely different language families and have nothing in common.
Yes, provided they live in Iran and/or are Iranian nationals.
or is he a member of the specific ethnic/linguistic that describes itself as Persian or Iranian,
Yes, provided their description of themselves is genuine.
thereby excluding all other groups?
Which other groups?