Free speech does have its limits but supporting a group (or even membership in a group) is not itself a crimeFree speech has it's limits. While I feel it is wrong I never said those people should be forced to take it down.
A person has every right to shave his head and walk around with a swastika emblem
No matter how offended a jew might get
So how does a white person not have a right to display a southern symbol on their car?
(And the black woman was ignorant anyhow since the civil war was about far more than slave rights anyways despite what some liberals may parrot these days)
The Emancipation Declaration was AFTER the war had already started (and seems like an obvious punishment to the southern states for succession)