I know this has been said before and, in a small way, I'm sorry to have to say this.
Seventy years after the event it is all too easy to draw on the luxury of a lot of time and 20/20 (6/6) hindsight. It's also all too easy to forget or not understand just badly Britain's back was to the wall.
I know a lot of folk here have been talking about "they started it", but that isn't really right. Neither the War nor the bombing of cities. But Britain's leadership, including that of the RAF, were simply doing the only things they could in order not to be overrun by the worst and cruelest regime for centuries.
Question them all you like after all this time. But you might be careful about pointing fingers, at least before you're sure you completely understand and consider all the issues Britain and her leaders were facing.