JACKSON, Miss.  — Commemorating the 150th anniversary of the Civil War can be an angst-filled task in Mississippi, with its long history of racial strife and a state flag that still bears the Confederate battle emblem.

Well-intentioned Mississippians who work for racial reconciliation say slavery was morally indefensible. Still, some speak in hushed tones as they confess a certain admiration for the valor of Confederate troops who fought for what was, to them, the hallowed ground of home and country.

“Mississippi has such a troubled past that a lot of people are very sensitive about commemorating or recognizing or remembering the Civil War because it has such an unpleasant reference for African-Americans,” said David Sansing, who is white and a professor emeritus of history at the University of Mississippi....