Exactly. In the words of the man himself:
“The Nazis entered this war under the rather childish delusion that they were going to bomb everyone else, and nobody was going to bomb them. At Rotterdam, London, Warsaw, and half a hundred other places, they put their rather naive theory into operation. They sowed the wind, and now they are going to reap the whirlwind.”
(Sir Arthur Harris)
That is an excellent quotation and very true.
My great grandparents happened to live only three miles from the Westerplatte Peninsula in Danzig in 1939. They were first-hand witnesses to the very first battle of WW II in Sept 1. Unfortunately, anything they wrote about it was lost.