Does the word nationalism specifically imply a feeling of kindred superiority in a secular sense?
For instance, if country X opposes themselves to country Y based on religious practice or reasons, would we still refer to country X's behavior as nationalism? In this scenario let us assume country X has no issue with a third country where the same religion is practiced as in country Y.
What if country X's claim to their homeland is based on a religious belief, would any behaviors which would have been classified as nationalism now be called something else?