sectionalism

[ sek-shuh-nl-iz-uh m ]

/ ˈsɛk ʃə nlˌɪz əm /

excessive regard for sectional or local interests; regional or local spirit, prejudice, etc.

Origin of sectionalism

An Americanism dating back to 1850–55; sectional + -ism

sec·tion·al·ist, noun

Even in the cemeteries, however, sectionalism trumped mourning.

The Real Memorial Day: Oliver Wendell Holmes's Salute To A Momentous American Anniversary |Malcolm Jones |May 26, 2014 |DAILY BEAST
The old Whig Party went to pieces on the rocks of sectionalism.

Marse Henry (Vol. 1) |Henry Watterson
If sectionalism be not dead it should have no place in popular consideration.

Marse Henry (Vol. 2) |Henry Watterson
But I confidently look to them for trumpet words which shall again rally the country against the sectionalism of Slavery.

Charles Sumner; His Complete Works, Volume III (of 20) |Charles Sumner

And sectionalism and individualism are two of the great curses of the United States.

American Adventures |Julian Street
Briefly, this party bequeathed the temper of political positivism and at the same time the dread of sectionalism.

Abraham Lincoln and the Union |Nathaniel W. Stephenson

sectionalism

/ (ˈsɛkʃənəˌlɪzəm) /

excessive or narrow-minded concern for local or regional interests as opposed to the interests of the whole

sectionalist, noun, adjective