Well I'll tell yu what I think.
I think they're racists. In fact I'd go as far as to say that they are the friendly faced cartoon depiction of the Klan.
No? Have another look.
All looking very similar, dressed in white pointy hats apart from their leader.
The Grand Dragon A.K.A Papa Smurf.
One blonde haired woman with whom they all breed so as to secure the purity of the blood line.
Still not convince?
Look at "the villan" of the piece
Need I say more?