I find some fault or under-reporting of this story in how they describe whether member news organizations knew they were publishing Nazi propaganda. There is a difference between the captions the AP transmits with photos and the cutlines that news organizations publish. Using a few published clips as evidence that the AP didn’t notify members is, at best, incomplete reporting and, at worst, incorrect reporting. Without seeing how the original Wirephotos were sent it’s impossible to know what the AP told its members.
Still, a lot to talk about in an ethics lesson here.