particularist

One whose opinions and conduct are characterized by particularism, in any of its senses; specifically, one who seeks to promote the interests of individual members of a political confederation as against those of the whole; in recent German history, one who desired to preserve the individuality in laws, etc., of the states annexed to Prussia in 1866, or of those states under Prussian influence.

Pertaining to or characterized by particularism.

One who holds to particularism.

One who holds to particularism.

Adhering to particularism.

Showing excessive devotion to one’s own region, nation, party etc.; partisan.