So you do realize that the American flag and Constitution were created by people, many of whom owned Slaves and didn't believe black people were people. In fact, the constitution specifically protected slavery for a certain number of years. I suppose we should get rid of the Constitution as well...
You'd only have some kind of argument if the U.S. had never changed and we were no better than the Confederacy. Comparing the two countries is simply ridiculous. The fact we recognize something is wrong with what the rebel flag symbolizes (as opposed to just shrugging it off) is actually an encouraging sign.