One of Hitler’s huge mistakes was that he didn’t take into account that antisemitism was strong in Poland 1935 - 1939, and that it would have been better for the Nazis to make Poles their allies instead of their enemies.
Hitler actually admired Pilsudski, who he credited with saving Europe from Bolshevism. He imagined Poland could have been a potential ally, because of Pilsudski's hatred of all things Russian. But wisely Pilsudski knew how dangerous Hitler was. Also Pilsudski was very tolerant of Jews. When he died, the Nationalists, headed by Dmowski gained power. They were much more anti-semitic, but hated the Germans with equal fervor, which is why there was no way Hitler would make a deal with them.
Interesting tidbits. Hitler attended a memorial service for Pilsudski when he died, and he made sure an honor guard was posted at Pilsudski's grave when the Germans invaded Poland.
Sure, and if Hitler been really smart he'd have made the Jews his allies instead of his enemies.
He wanted land in the East for Germans to settle on, and that meant Poland and the Soviet Union.
He also regarded Slavs as inferior beings without rights. So what you want wouldn't have happened.