They may well believe it makes the rise of a nazi party impossible, but they are also a certain kind of retarded.

"Guys, did you know they didn't know who was jewish by looking at them, so they made jews wear armbands to identify themselves?
"Guys, did you know they didn't know who was jewish by looking at them, so they used genological records to figure it out?
"Guys, did you know they didn't know who was jewish by looking at them, so they tried to trick them into admitting they were jewish?

So...our solution...is to make it obvious that they're jewish based on their skin color.
Once everyone else is light brown jewish people will immediately stand out.

(...What?)