Nazi Belt Buckle Is Wearing A Belt Buckle With The Iron Cross On It I Bought From A Major Retail Store Bad?

Is wearing a belt buckle with the Iron Cross on it I bought from a major retail store bad? - nazi belt buckle

I've recently bought a belt buckle shop my friend works in the so-called Blue Anchor. When I came home from school for winter break, my parents have asked why he wore a Nazi belt buckle. Well, coming up the device with the Iron Cross makes the sale?

http://en.wikipedia.org/wiki/Image:Bundeswehr_Kreuz.svg