cnn's victor blackwell reports. >> reporter: in a quiet, rural county, about 35 miles west of jacksonville florida hangs a mural. it depicts in the artist's words, the thousands of years of history and prehistory. and thousands of people from across the country have stopped to admire it. some leaving notes of appreciation. andre thinks it's an extraordinary piece of art. then there's this anonymous message. should make the kkk bigger and brighter. yes, that kkk. >> the ku klux klan is not heritage. that is a hate group. >> reporter: the simple inclusion of these horseman is not the issue, it's that this mural is hanging inside the baker county courthouse. >> if i were to walk into this