@CalBear
I am not sure. How would you differentiate the old Akkadian notion of expansion with that of the Nazi era genocides? It would seem to me, that in many ways, the Assyrian state especially maintained at least a dogma of genocide and devastation as a moral good fro much longer periods of times than the Nazi regime. Further, if I am not mistaken, the Nazi party cadre attempted to hide these exterminations beneath the public eye, in other words, they did not use the Holocaust as an example of propaganda. Meanwhile, in Assyria, ready practice of mass slaughter was seen as not only accepted, but was a moral good according to the will of the elite's and religious dogma.
Such bloodletting propaganda was common and was within the Akkadian cosmological understanding. Wherein, the only 'humans' were those who lived within Mesopotamia and practiced the harsh agriculturalism of the Uruk period. This message of supremacy entailed for the Assyrians after 1480 BCE, a elite propaganda, that claimed readily and bragged widely about genocide. Claims were made akin to 'hunting the people of Nairi like gazelles' making thus the comparison that these peoples were little more than prey whose humanity was irrelevant to the mission of expansion and replacement. In this period from 1480-1260 BCE, the Assyrian kings would exterminate nearby pastoralist peoples as a matter of dogma. This was meeted out especially to neighboring peoples who did not practice the same type of agriculture or government to Assyria.
Mario Liverani, the preeminent Assyriologist of Italy, notes a trend. Assyrian state apparatus would seek submission form a people, if there was a pause in the thought process, the people in question were to either be exterminated or enslaved. The discrepancy in that the people who paused, typically were societies that lacked central governments and the Assyrian state dogma, as an exporter of authoritarianism, considered people who lacked kings to be 'non-humans' (the term was literally, 'denizen, are you human?').
Over time, this level of radicalism declined. Under Shalmaneser I (1264-1233 BCE), the Assyrian kings begin to add enslavement to their punishments to sinning folk alongside extermination. Increasingly, this becomes the more common situation in regards to punishments. Nevertheless, it is important to note that the Assyrian state dogma did revolve around a form of what we may call, genocidal tendency and cultural destruction. It did so further, without any veil upon it nor without a notion of civilizing. Indeed, the justification was simply that the 'weak serve the strong' or that it was ordered by the Great Gods, who decreed such things. Subconsciously, it was rooted perhaps in the experience of the Uruk civilization prior, which by all accounts acted as a sort of hyper-expansionist agricultural zones, pushing back and replacing through warfare earlier and more traditional farming villages. Thus, the battle for land and resources.