Of course it wasn't only about slavery.
Regardless, what the PC crowd is doing right now with respect to these statues and monuments is absolutely shameful.
Military leaders have always been distinguished in a way which is separate from the policies their leaders espoused. They were soldiers following orders, and in most cases, that should suffice to distinguish them from any bad ideas which their war might have been founded in.
This is why even German soldiers and officers from WW I and WW II still garner a measure of respect for doing their jobs well, and from the prowess of the common soldier to the tactical and strategic genius of their commanding officers leaders.
Confederate soldiers, by and large, weren't fighting for slavery; in their minds they were fighting for their homelands, as well as the concept of States' Rights. The States' Rights cause simply was pinned to the wrong foundation.
Stonewall Jackson, Robert E. Lee, and other Confederate military heroes were universally respected by both North and South for their superb qualities as military professionals.
The people who are leading the charge to obliterate history couldn't be more misguided. It's a testament to the deplorable education system they are brought up within. In destroying history which they don't like, they are performing a disservice even to their own history—for much of that will also fade into obscurity along with the "giants" who are being taken down. It is through these larger than life figures that we gain entry into the intricate and highly informative details and nuances of these conflicts.
Everything becomes so PC, so "cut and dried" nowadays, that people don't even learn real history. And this is true for all points of view regarding a given conflict.
Regaining control of the American education system is another critical aspect of making America great again...