▁people ▁to ▁make ▁their ▁position ▁on ▁commun ism ▁felt , ▁but ▁did ▁not ▁directly ▁esp ouse ▁violence . ▁The ▁ri ots ▁were ▁explicitly ▁rac ist , ▁with ▁the ▁ri ot ers ▁shout ing ▁rac ist ▁terms ▁for ▁African ▁Americans ▁and ▁Jews , ▁ ▁burning ▁cross es , ▁and ▁l yn ch ing ▁eff ig ies ▁of ▁Rob es on ▁both ▁in ▁Pe ek sk ill ▁and ▁in ▁other ▁areas ▁of ▁the ▁United ▁States . ▁ ▁First ▁concert ▁The ▁concert , ▁organized ▁as ▁a ▁benefit ▁for ▁the ▁Civil ▁Rights ▁Congress , ▁was ▁scheduled ▁to ▁take ▁place ▁on ▁August ▁ 2 7 ▁in ▁Lak eland ▁Ac res , ▁just ▁north ▁of ▁Pe ek sk ill . ▁Before ▁Rob es on ▁arrived , ▁a ▁mob ▁of ▁loc als ▁attacked ▁concert - go ers ▁with ▁baseball ▁b ats ▁and ▁rocks . ▁The ▁local ▁police ▁arrived ▁hours ▁later ▁and ▁did ▁little ▁to ▁interven e . ▁Th ir teen ▁people ▁were ▁seriously ▁injured , ▁Rob es on ▁was ▁l yn ched ▁in ▁eff ig y ▁and ▁a ▁cross ▁seen ▁burning ▁on ▁an ▁adjacent ▁hill side . ▁The ▁concert ▁was ▁then ▁post pon ed ▁until ▁September ▁ 4 . ▁and ▁Neg ro ▁spiritual s ▁ending ▁with ▁" O l ' ▁Man ▁River " ▁ ▁Rob es on ' s ▁accompan iment ▁was ▁provided ▁by ▁Larry ▁Brown . ▁ ▁After math ▁The ▁after math ▁of ▁the ▁concert , ▁however , ▁was ▁far ▁from ▁peace ful . ▁ ▁After ▁some ▁violence ▁to ▁south - going ▁bus es ▁near ▁the ▁intersection ▁of ▁Loc