The SS are dumbasses who need other minority groups to do their fighting.  They hide behind the Volksdeutche of other countries and even recruit non-Volkesdeutche, because they can not finish the fights they started.  After Malmedy the Fifth Infantry Division stopped obeying the rules of war when fighting the SS and they had to come under a white flag to ask that they be treated as soldiers again.  In my Division we honored the German Frontsoldaten as a good soldier fighting for a bad cause, but the SS were reguarded as criminals and f-ups.

The quote is "If somebody slaps your cheek, offer them the other seems like a bit of bravado to me.  The implication is that the slap had no effect.  You can always follow that up by stomping on his head which is a lot more effective than slapping.