First there was Judaism.

Then came Yeshua ben Yosef, the fulfillment of Jewish Prophecy making him the Jewish Messiah for Jewish People.

Yeshua ben Yosef, a Semitic man, explicitly made clear that he considered Europeans subhuman by withholding healing from a European woman and calling her a dog - though he relents when she acknowledges Jewish supremacy and the Goyim place of servitude for the Chosen Ones. Yeshua proceeds to make clear that he is mad at the corrupt leadership of the Pharisees and that he is coming only to save the lost sheep (hence the corrupt leadership) of the House of Israel (not Europeans as he just demonstrated.

You have to be wilfully retarded to believe Christianity is any different from Islam or Judaism - all three are equally foreign to the European spirit.

Nope. You get brownie points for "faith" which can most accurately be defined as willful belief in something you can't defend with reasoning and evidence. That harder it is to believe, the more brownie points you get.

I don't even know mainstream narratives because I know it's all garbage. What were they told?

Story we got told in school is because he was just expansionist and he had gotten away with everything up until that point so why not. Honestly I'd say that's at least partially true. He wanted to at least restore Germany to it's greatest territorial extent. He likely had no idea invading Poland would finally provoke the allies to declare war, since he wasn't aware of their secret treaty and they'd mostly been friendly with him up until then.

Germany attacked Poland in Danzig because jewish poles were killing German's, correct?

And because Polish troops crossed the border for funsies and attacked German border outposts firsts. Except that turned out to be a false flag by the Germans and I'm having trouble finding evidence for the claims about Germans in Danzig being attacked that don't come from the NSDAP.

Plus, Germany had already divided up Poland with the Soviets at that point, so the attack was clearly premeditated, not based on some humanitarian emergency.

If we're talking about objective reality, history is usually more complex than "good guys vs. bad guys."

The reason we talk in those terms is because our emotions are geared towards simple ingroup vs. outgroup calculations. The primary purpose of politics and culture is to determine the outgroup and defend the ingroup, hence Plato's assertion that: "Those who tell the stories rule society."

In the case of modern germany they call Hitler "the bad guy" because those who tell the stories have taught them that they are their own enemies. Hopefully that changes, but either way the only way for Hitler (an invader) to become "the good guy" in Poland is for them to be taught the same lesson, which should not happen and I hope does not happen.