The German Airforce is probably wondering why you’re worked up as the iron cross is the roundel marking on their aircraft. The symbol is associated with Prussian militarism and far predates any Nazi associations in the German Military.
I wasn’t really sure what you were talking about, so I looked them both up, and I think there’s a really good chance your optician gave you Nazi-tinted lenses by mistake.
Maybe that’s why the Bible reading for Ash Wednesday services has Jesus telling people to put oil on their heads and wash their faces so that their fasting may be seen not by others.