That was the reason? Considering all the lynchings, cross burnings, Jim Crow laws, acts of terror, and blatant racism being part and parcel of mainstream popular culture until at least the 1950s, they really didn't need any statues to show black people who was still in charge. In my opinion, the statues exist primarily to propagate the "lost cause" version of history, to paint their cause as more "noble" than it actually was.
And why did the North go along with this? Why did the Northern perspective on the Civil War similarly de-emphasize slavery while saying it was all about preserving the Union? Perhaps they were trying to show people who was still in charge as well.
I don't really care about the statues all that much. Tear them all down; I won't stand in the way. The real question is whether we're learning the correct lessons from history. I prefer to look at history as a way of telling how we got to the point we're at now. When it's treated as a bunch of disconnected stories full of "heroes" and "villains," it gets treated more as a comic book.
And then we wonder why we still have these problems. The violence that occurred in Charlottesville was obviously over a deeper, more serious issue than an argument over differing interpretations of American history.
One thing that can be observed is that - these people who dress up as Nazis, KKK, etc., they're mostly poor, disaffected types - the kind who fit the profile of potential gang members. They're angry, angst-ridden, full of p. and vinegar, and spoiling for a fight. They were likely raised in abusive environments, had a poor education, and very few prospects or opportunities for advancement. If they were black, they'd likely join the Crips or the Bloods, but since they're white, they have to join some "gang" that will accept them.
That's what seems to be missed here. I think too many people are reacting to costumes, flags, and other imagery. They're just looking at pieces of cloth, without looking at the person underneath, along with the society/culture in which they're raised.