Please explain why George Washington statue was hidden during MLK rally in S.C.?

What the huh? This was done by the NAACP so that attendees would not be "offended"? Maybe they need to hold their rallies on non-American territory then. Like Cuba. I am really offended by this!
Hat tip Atlas Shrugs via Hillbuzz.
Good coverage at Maggie's Notebook on this topic.