THOUGHTS AFTER SEEING A DER STURMER T-SHIRT

Not much shocks me, but I was floored to see a guy wearing a Der Sturmer t-shirt. The name belonged to a Nazi propaganda sheet that dehumanized Jews.
  1. Who would wear a shirt celebrating Nazi dehumanization in 2015?
  2. If the shirt is meant to be ironic, it failed.
  3. Should I confront this guy wearing the shirt?
  4. I didn't but spoke to his friend who said it was from a band.
  5. The band is from Greece and plays metal music. It's allegedly affiliated with the xenophobic and racist Golden Dawn party.
  6. Would the guy wear a KKK shirt, if such an idiotically-named band existed?
  7. Am I being oversensitive?