For those uneducated of any race, I imagine it offends them. But that's because of their ignorance rather than their race. The documentation of the existence of Black Confederates and Jewish Confederates is well known.
Of course now that article, a C+P from you know who, with Jimmy Mcphernut and the park ranger denying it all. Of course there won't be facts, but I've found liberals don't need facts, they just live off emotion