LSSBB
Devilish Dictionarian
You don't know what you are talking about. 1937 and Guernica was the Spanish civil war not WW2. You can't even stick to the thread topic.
Britain started bombing German cities and towns in May 1940 after Churchill became prime minister. This before there were Luftwaffe raids on British cities.
http://whale.to/b/kollerstrom.html
Of course you completely ignore the fact that Churchill refused Hitler's offer to stop the bombing of civilians if he would do the same as evidenced in J M Spaight's Bombing Vindicated published in 1944 by the British government -
www.inconvenienthistory.com/archive/2015/volume_7/number_1/bombing_vindicated.php
It was still the Luftwaffe. So Germany gets a bombing pass if it was a battle not officially included in WWII?
http://www.eyewitnesstohistory.com/guernica.htm