They don't get to say "sorry it was an accident" when they specifically didn't send the message to German users (which could get them into legal trouble).
They also don't get to say "it was one Nazi intern acting on their own" when no one was fired for it.
And by the way, the "it was one rogue intern" narrative is not something they ever claimed or implied in any of their PR messages. They would look a hell of a lot better if that's what happened, but that's not the case.