You would want to be protected by having a highly visible symbol on your hand? It's a fucking target, a mark so they know who doesn't have at least one magical grandparent.

And there is nothing offensive to comparing this new system to Nazi Germany. Hitler placed tattoos on anyone who entered a concentration camp, a number on the back of their wrist. He thought of the Jews as lesser than the Aryans and "took care" of them accordingly. Subjecting anyone in our modern time to place a fucking symbol of heritage anywhere on their personage, a permanent symbol is the same as placing a number on a Jew or a gay.

Perhaps the Ministry has their heart in the right place, but they're going about it in a completely wrong way.