On the contrary, confederate is either a noun, verb, or adjective depending on use. But while Turkey can be a proper noun when referring to the country, confederate is not because there was no country called the confederate states.
As for the rest it ignores the questions I've asked over and over again. Where are the contemporary accounts from the southern leaders of their black combat troops? Where is any word from Stonewall Jackson of the fighting prowess of the troops that Dr. Steiner saw and whom you believe were combat soldiers? Why does Robert Lee lament the fact that he is forced to give up his preferred all-white army and bring in black troops? There isn't any, because the idea of a black man fighting on equal footing with a white man was an anathma to the southern leadership from Davis on down. Look at what happened to Patrick Cleburne in 1863 for suggesting it.
So now I suppose you're going to tell me he's a liar?!
No, but Dr. Williams wasn't there and given his mistakes in history in the past I don't place a lot of stock in this comment, either.
There you go again. I suppose Taiwan doesn't exist either...from a legal standpoint (sarcasm).
In error again, non sequitur? For confederate, my Merriam-Webster says: "capitalized: of or relating to the Confederate States of America"