Really? The internet is always so quick to jump to extremes. Someone making a mistake at work doesn’t mean they need to be fired. Yes they are responsible, but if they didn’t do it on purpose then why do they deserve to lose their livelihood over a stupid email? Some compassion could be in order here, they will probably never hear the end of it at the work water cooler anyway and to me it seems like enough of a punishment. Assuming this was some deliberate dog whistling is just bad faith.

Fact is it wasn’t sent in Germany where Nazi symbols are a criminal offense and that tells you whoever did this knew.

Does it? Somebody wrote the email, then the email was sent to translators for different markets. The German translators noticed the problem and decided not to send the email, but didn’t report it back, or reported it back too late. What makes you so sure the person who wrote the email was made aware of this? Maybe they were, I don’t know, but you can’t just act like you are sure. I worked at bigger companies enough to know that things fall through the cracks all the time and trying to reach a department in another country is often a multi-day effort with no guarantee of success.