THIS is the heart of his problem. He wants to come across as religious but he has tailored his observance of his religion to fit his own wants. Personally I don't like to see tattoos on anyone. That being said, only son will graduate the USNA this coming spring and will be going Marines. He has said he may get a tattoo of the Marine symbol with his blood type below. He's as Conservative as you can be so what am I to do??
Is he Jewish? The only thing you can do is express your disapproval in a convincing way. Then it is hands off.