They specifically didn't send it to German accounts cause they knew it could be shown as Nazi symbolism.
This isn't a "sorry we fucked up" this is a "we knew it could go wrong but didn't care enough to do anything about it".
Personally I don't really care that much. These promotional emails aren't reviewed by every company member, so even if it was deliberately used Nazi symbolism, its at most someone in the advertising department. But I also understand why people are really upset about this.