Not when it's being taught by the same people who apparently taught you...
Now, we know that Ben Butler wasn't always truthful. He had a tendency to boast and exaggerate. He can't be taken literally. And he wasn't always friendly towards Blacks. But it does make you think that people who are promoting the "Black Confederates" story might be surprised if they could actually meet some of the few African-Americans who were willing -- though not allowed -- to fight for the Confederacy.
Interesting webpage here.