The Nazis entered this war under the rather childish delusion that they were going to bomb everybody 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.
https://en.wikipedia.org/wiki/Arthur_Harris
https://en.wikipedia.org/wiki/Hosea_8#Verse_7
The “reap the whirlwind” line is actually quoting the old testament, which only makes it even more badass.