Smurfs are vaguely tied to white power.
All blue homogeneous society, no other colors. All wore white hoods, except for Papa Smurf. Just like the KKK, where all wear white hoods except for the Grand Dragon and other leaders. Their society is socialist, just like the Nazis. That is why everything went to chaos when Gargamel gave one of the Smurfs a coin in hopes of making Smurfs greedy. In socialism, its wrong for an individual to have more than others. Since the coin was a gift, he had every right to it, but Smurf society couldn't accept that. This also brings up the slam on Jews in that show. The coin episode is a slap at Jews for their alleged use of money to corrupt societies. Gargamel has a Jewish name and even has the appearance of a "sinister Jew" as a racist person would portray them, right down to the over-sized hook nose. The cat, Azrael, has the same name as the muslim word for "Angel Of Death". Azrael is also pretty close to Israel, the Jewish homeland reviled by anti-Semites. Smurfette was a long blonde Smurf beauty, iconic of the Aryan ideal female.
Other items of interest:
Often danced around fire (cross burning reference?)
Evil spell turned them black and made them act bad (a stab at black people?)