I simply posted the content of a document propagated by Generalkommando I Fliegerkorps. I've given a reference,if you want to check the translation feel free. It is dated 24 July 1940 and makes a specific reference to "ruthless retaliatory terror raids on British cities". I think the translation is by the Air Historical Branch but I am not absolutely sure.
'A document propagated by Generalkommando I Fliegerkorps' - that would be your reference?
The word "retaliatory" is included. I neither edit my references nor selectively quote to suit any particular point of view. If I remember correctly the invasion of Poland was itself a "retaliation" for some imagined Polish agression.
*SNIP lenghty irrelevancy excuse for documents shown not supporting conclusion*
You seem to mix concept of retaliation with casus belli, though I did not get your point about the origins of the hundred years war.
The expression "terror raid" in direct reference to British cities was in use at a Luftwaffe headquarters in July 1940,sometime before the RAF targeted any German city.
No, the RAF bombed German cities since May 1940. Besides - riding on words is meaningless. The world retaliatory or reprisal air attack was in everybody's vocabulary. The bomber forces were very much like MAD in the nuclear era - everyone was watching the other, vouching not to strike first but retaliate in kind if need be. Its only natural that higher orders would deal with this issue. In case Luftwaffe, standing order was not to launch terror attack unless RAF do so first.
I am fairly sure something similar was written in RAF general orders, although War Cabinet meetings in 1939 show clear that bombing of German cities as strategy was considered since 1939. Fear of German reprisal attacks made them to consider twice, until May 1940, when situation on the ground become so critical that they wanted to bait the German air force into a bombing war of each others cities by provocative attacks on German towns - which, given bad situation was seen as better alternative then Luftwaffe bombers giving effectice support to Heer in Low Countries.
For practical purposes of this discussion, it is enough to fix that Luftwaffe standing orders ruled out terror attacks apart for retaliation. Attack on industry and supply was preferred method, much like USAAF doctrine.
It is clear that this sort of bombing was being considered as part of the strategy for the attack on Britain from,at the very least,mid 1940.
No they were not, you misinterpret the document. The wording is very clear that 'this sort of bombing' was only being considered as a reaction, should the British initiate such attack first (which they did, at least in German perception, for months already).
If Hitler would have wanted to employ such attacks as a strategy, he had more than ample excuse to do it, since the RAF bombers flew hundreds of bombing sorties against German cities since May. But Hitler was not particularly fond or convinced that such attacks would be useful at all (he had turned down such incitive in Septemer 1940 several times, in fact also in July when IIRC Keitel proposed it), therefore, they were very much kept at a minimum in favour of bombing industrial targets. In the Luftwaffe, before the bomber baron mindsets simply lost out and few would have preferred such douhetist doctrine. They simply did not believe in it (and as a matter of fact I find it hard to find anyone else, except of course good old Harris since his childhood).