"Here at Gettysburg armies of capitalist white males killed each other demonstrating their inborn toxicity.
"Couched in propaganda about 'freeing slaves', the war was actually an economic conflict where the industrial robber barons of the North wanted to secure black bodies to slave for wages in their sweltering factories.
"The degenerate racist whites in the South preferred violence over surrendering their enslaved Africans, who they used as much for rape and sadism as for the agricultural labor that built America from nothing.
"We ask visitors to please take a moment to remember the 400 years of unspeakable cruelty these kidnapped and enslaved black victims of white capitalist evil suffered. White visitors are asked to kneel although this absolves nothing.
[plaque sponsored by ActBlue, SPLC and BLM]"
--one of the replaced plaques, probably.