After Palmyra ISIS Targets Monuments on U.S. Soil

The line is drawn again and again as societies change. There is no line, only lines.

But where should we place the limits?Consider Stone Mountain Georgia, a large relief sculpture on the face of a quartz dome in Georgia. It is in a State Park and so definitely part of State funded items. Like the similar image found on the Stone Mountain Commemorative US half dollar issued in 1925 it depicts figures on horseback.None of the figures are identified on either example but the coin does say "Stone Mountain" on the obverse and "Memorial to the valor of the Southern soldier" on the reverse.There have been requests lately that the sculpture be destroyed.It certainly would be difficult to remove but not impossible.What would be the reasonable practice; should the sculpture be destroyed and the coins taken out of circulation and melted down?