"Keith has been saying all along that because the current popular view of WW1 is what he is saying, it must be true."

Unfortunately prolific GUEST that is NOT what Keith has been saying, he has never said anything close to that.

What he has said if I understand it correctly is:

That he has read about the First World War throughout most of his adult life, he has read the recently published works of various commentators and historians that updates previous histories and he finds himself in agreement with them. He did not first have a view point and then cherry-picked historians old and new to bolster his point of view. Go back and check the narrative if you want to.