Short answer: He had no choice. He wanted to take back East Prussia which had been annexed by Poland after WW1. Polish military were committing atrocities against Germans in Danzig. Poland and England/France had mutual protection pact, Hitler thought there was no way in hell England/France would honor that because he saw it as primarily a local territorial dispute. He called it wrong, the western front opened up, and the rest is tragically misunderstood history.
Question. Why did Hitler invade other countries? Why didn't he just chill in Germany.
Short answer: He had no choice. He wanted to take back East Prussia which had been annexed by Poland after WW1. Polish military were committing atrocities against Germans in Danzig. Poland and England/France had mutual protection pact, Hitler thought there was no way in hell England/France would honor that because he saw it as primarily a local territorial dispute. He called it wrong, the western front opened up, and the rest is tragically misunderstood history.
Then why the camps and ovens? Hitler wasn’t misunderstood, he was a monster.
There were no “ovens”, or even “gas chambers”. David Cole proved that was all post-war propaganda.