There is at least one if not more pseudo-reality tv shows about fixing tattoos. Mebbe he asked for a leftward oriented swastika and got a right one by accident. 

Mebbe the tat was the good luck charm and the owner was or is interested in Hinduism, Buddhism or Jainism. 

The camper could have disarmingly said or asked the owner about their religious good luck charm. If the owner believed he was being some sort of tough guy anti-semite and has it turned around so he is follower of ancient (12 k years ago) religion, he might wear long sleeves more often.