From SK's law quote:
For purposes of this section, “disturb or interfere with” includes removal of, damaging or defacing monuments or memorials, or, in the case of the War Between the States, the placement of Union markings or monuments on previously designated Confederate memorials or the placement of Confederate markings or monuments on previously designated Union memorials. [my emphasis -- C.R.C.]
But that doesn't mean anything, since there was no "War Between the States", just a War of Southern Slave-owning Rebellion. No protection mentioned for that one.