Wrong.
Churchill started the intentional civilian bombings of German cities in WWII.
Prior to that, while Germany had bombed cities during it's Polish, Norway, and Holland campaigns - but as specific air support for German ground forces.
Britain was bombing German cities, at night, indiscriminately, for 3 months, before the Blitz started. Hitler thought Churchill's actions were the height of insanity, and refused requests from the German High Command, repeatedly, to begin bombing urban centers in England, in favour of continued targeted air strikes on RAF installations.
There are many, many sources for this information. But it is inconvenient to the narrative of the war as told by the victors.
http://www.westernspring.co.uk/who-started-the-bombing-of-civilians-in-world-war-ii/
Now, that's not saying Churchill (and Harris) were wrong. But when it comes down to "who started it" - in the matter of mass bombings of urban centers - it was the British who opened that can of worms in WWII.