Lee and Jackson are buried here in Lexington, a small city of 7,000 tucked among the foothills of the Appalachian Mountains, near the border of West Virginia. For more than a decade, Confederacy enthusiasts have gathered on this January weekend to celebrate the generals’ birthdays and “flag” the city — a term they coined to describe standing along thoroughfares, some dressed in Civil War costume, waving Confederate battle flags.

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Julia Rendleman for The New York Times
The tradition is at odds with the beliefs of many residents of this predominantly liberal college town,…