Katz reminds me of Costas griping about the Redskins name. Costas said Redskins for his entire life, and it was never in a derogatory context. Then, suddenly, someone said it was "wrong" and he goes on a tirade on TV after a game deriding the team. Phil Simms made the comment, that same year, that he would never use it again. Well, he started using it again.
The Confederate Flag is not exactly the same thing. But, it's still a controversial issue. The Rebel Flag is just a Rebel Flag to some people. To others, it always means that you want black people to go back to being slaves and being inferior members of society.
There was a cool documentary about Lynyrd Skynyrd that I recorded and posted a you tube video when the flag issue came up. Skynyrd used to drape it behind them in concert.