In this Hitler speech: <https://www.youtube.com/watch?v=Tran_0-lC5c>

Hitler claims that during the conflict with Poland, he gave orders to the Luftwaffe to commit the war in a "humane manner" IE: attacking only military targets, and not to bomb the cities.

Can this be verified? Certainly would go against the popular narrative of the Nazi's if this were true.

I haven't been able to find many exact details of the Poland invasion. Anyone know of any evidence that supports or disproves this?