You know who else should change their flag? The state of Georgia. Their flag is a virtual carbon copy of the first national flag of the Confederacy. See below.

Flag 1 - Georgia State Flag
Flag 2 - First National Flag of the Confederacy

Fact check me. https://en.m.wikipedia.org/wiki/Flags_of_the_Confederate_States_of_America

They've been hanging on to the Confederacy in Georgia for a long time.

https://en.m.wikipedia.org/wiki/Flag_of_Georgia_(U.S._state)

The flag that triggers folks, and is widely seen & used today, was the Confederate Naval Flag (pictured below). Mind you, this flag really hasn't any place in our society, so it is great that people and organizations are doing away with it. But don't be deceived...

They will begin flying other flags with unsavory meanings, such as the Bonnie Blue Flag (pictured below), which has ties to the Confederacy, just like the other flags mentioned in this thread.