Honestly, I'd be more concerned with someone who knows too much Nazi minutiae rather than too little.
EDIT: reading the CNN story, I'm actually less convinced, this is all coming from a conservative activist ex-girlfriend. Its a really obscure symbol and then there's this quote:
"Platner argued that he had the tattoo for 17 years without anyone raising concerns about Nazi symbolism, noting that he received a State Department security clearance, reenlisted in the Army after being screened for gang and hate-related tattoos, and regularly appeared shirtless around family members, including Jewish relatives."