I'm sure they just found a bunch of wolfsangel and sonnenrad patches lying around and thought they looked cool. Their buddies probably pranked them with a prominent swastika tattoo while they were passed out.

It's funny because the press could just say "These guys are Nazis but cooperation with them fulfills US foreign policy objectives. Sometimes we have to work with people we don't like." But instead they piss in your face and tell you it's raining.