What if this event combined with the international rejection, caused a massive uproar against the Nazis? Maybe not so much to protect the Jews but because it laid bare the brutal and authoritarian nature of the Nazi regime convincing them that they must be stopped now before they become the target of brutality.
What could change because of this? Could this cause the Nazis to back down on their antisemitic actions and possibly prevent the final solution? Could Goebbels get ousted (he was the main guy behind it and it doesn't help Goering was extremely pissed about it, for pragmatic reasons)? If it got so bad that the Nazi Party is overthrown, how would the rest of WII proceed? Would Operation Barbarossa be more successful or less than in OTL?