Reading vol. 8 of Germany and the Second World War, I was shocked to find it repeating the myths of the Eastern Front about the supposed Soviet "human wave" attacks which I thought were dispelled by modern Western historians like Glantz who utilize the Russian archives. Yet here the authors cite B. Liddell Hart and other old Western secondary sources to the effect that "the Germans were forced to concede ground because of the pressure of sheer weight of numbers against them" comparing the Soviet advance to a steamroller. The volume also disregards official Soviet reports as propaganda and instead cites revisionist Russian historians like Sokolov while at the same time accepts at face value official documents compiled by the Wehrmacht. Can I trust this work of history or have the authors allowed their German patriotism to distort their historical research?
I have not read the majority of Das Deutsche Reich und der Zweite Weltkrieg and do not currently have library access, would you be able to provide longer-form quotations covering the biased bits here? I will say that some of the papers I've read which draw heavily on Vol. VIII of the book did also seem to repeat some worn-out myths, and I've had my suspicions. Krisztian Ungvary is one of the co-authors for Vol. VIII, and he is a rather markedly anti-Soviet author so that perhaps signposts some of the biases that could be at play.
I can't speak to the official German history of WW2, but as somebody who did his MA thesis on the World War I British Cavalry, I have some serious issues in general with Basil Liddell Hart.
The man didn't last long on the Western Front, and then proceeded to depict the British senior officers as incompetent idiots, giving rise to the "lions led by donkeys" thesis that has been thoroughly debunked in professional circles. And, having also done primary source research on what the British infantry and military in general were working on between 1905 and 1914 (doing your MA at a military college has its benefits), most of the articles are about how to deal with trenches (due to the fact that the Russo-Japanese War was a trench war, and horrified the military observers who were there)...except for two main writers: J.F.C. Fuller and Basil Liddell Hart.
So, based on the level of sheer distortion that he imposed on the history of the British army in the Great War, I'm not inclined to trust Liddell Hart on anything historic.
(Apologies for the rant, but it seemed at least marginally appropriate.)