Language -Dose the experesion "Hedosn't know know sh!t from Shinola" have racist orgins?

Dose the Expression "He doesn't know sh!t from Shinola" have racist origins- after all the difference between Polish- relating to some one or something from Poland and polish- which would be Shinola is a capital p. So perhaps at one point it was "he doesn't know the difference between Polish or Polish" then some bigot changed it.