The KKK was a Southern phenomenon that occurred AFTER the Civil War.
I suppose you might draw some parallels between the two, but the one is not father to the other.
Both groups were made up of Protestants who didn't like Catholics. That's a pretty good parallel.
Sorry, does not compute. They are not the same religion ~ not even close.
You still have to overcome the quite apparent time dilation factor ~ BEFORE and AFTER are meaningful.