And if they were going to over turn tombstones at Gettysburg National Cemetery, they would have been destroying the stones of UNION Army soldiers who fought and defeated the Army of Northern Virginia. There are NO Confederate soldiers buried in the Gettysburg National Cemetery. Those Confederates that were buried in the Gettysburg area are, if still there in private cemeteries or unmarked individual and mass graves. After the Civil War many of the CSA soldiers were moved to the South, if either the individual was known or if in a mass grave of soldiers from a single regiment.
That would be pretty handy if'n the antifa-kkk-blm-types tried anything and they were met with a few rattled and battle-hardened ghosts.