I'm looking for a word that is similar to patriotic but does not relate to one's country (or state).
For what it's worth, I'm specifically referring to "overly patriotic" in a negative sense, to describe someone who has a overly sentimental/cultural or otherwise less-than-rational attachment or devotion to something and makes it part of their very identity. A common example might be an extremely zealous football fan.
Best Answer
partisan
From Google:
Also adjective; the abstract noun is partisanship.
This addresses the question in the title and first paragraph.