While the idea that the UK is the instigator of the war is delightfully odd, the OP does have a point - the article briefly alludes to the existence of earlier bombing (first para, "Change of strategy") but never explicitly mentions it. However, the official history does explicitly connect the August raids to the start of the Blitz, even if they weren't the sole reason:

It would, of course, be too much to see in these raids on Berlin the whole cause of Hitler's next move; but they unquestionably added to his anger at the activities of Bomber Command. it would not be long now before D-day. What better policy, then, for this final phase, than to enjoy a swift and sweet revenge by hurling the Luftwaffe in force against London. For if the British capital could be reduced to chaos, the task of the invading armies would be enormously simplified (...) 'The British', he screeched, 'drop their bombs indiscriminately and without plan on civilian residential quarters and farms and villages. For three months I did not reply because I believed that they would stop, but in this Mr. Churchill saw a sign of our weakness. The British will know that we are now giving our answer night after night. We shall stop the handiwork of these night pilots.' Three days later, on 7th September, the Luftwaffe abandoned its offensive against the sector stations and began the assault on London. From the point of view of winning the battle, Dowding himself could not have made a more satisfactory decision. (pp. 182-183)

Omitting to mention the British bombing through August, and the theories of a "revenge for Berlin" motive, seems a bit strange.