imply extend his logic about why the flag should not be flown on government property to the Stars & Stripes as it pertains to the internment of Japanese Americans and Native Americans (among others), and it's pretty clear that if one flag "should go", the other should as well.
The difference is the stars and bars is a symbol of an unconstitutional rebellion which, at its core, was the very anti-thesis of the principles of liberty upon which this nation was founded (it sought to justify as a positive moral good owning other human beings as if they were cattle). The Founders looked upon slavery as a necessary evil entailed upon the Constitution (and upon them) by circumstances largely outside their control. When the United States has fallen short of our ideals (eg., as with the internment of Japanese citizens in WWII) we did not hail the result as a positive moral good. It was more along the lines of a necessary evil. So, whereas the United States has sometimes erred in the application of principles of liberty (as Japanese internment shows) that is very different from rejecting those principles altogether as in the justification of human slavery as an ideal, as a positive moral good, which is what the South did.
In the one hand, the United States has been imperfect in living up to its principles; in the other the South rejected those principles altogether.
Jordan