I grew up in the South and there's the insidious presence of all the monuments and statues in public places and state houses of leaders of the slave states during the Civil War. Then all the public schools named after Jefferson Davis or Robert Lee or similar traitors. My high school history classes always emphasized the South was fighting for states' rights and their way of life, as if slavery was something honorable. The message is loud and clear of the institutional support for these attitudes.
