Poor analogy, they had a right to try and break away, unfortunately they fought for the losing side, and ultimately surrendered.  Though some still hold those values that they are superior to another race, and should be able to own other human beings. You want a "white nation" go back to your homeland.
These monuments to the these supposed great men were not erected during or even immediately after the war they were erected in the early 20th century to make sure people know there place. Some were even erected during the height of the civil rights movement. The reality is that they should have never been erected in the first place, it's time to bring them down.