Yes I believe these charges, based on the USSR having established a widely-known precedent for such behavior in the 20s and 30s. Here is a picture of a Polish POW, Captain Rosinsky, being tortured to death in the 1920s by the USSR on order of the communist party. As you can see, it was not even kept hidden, it was done publicly.
His genitals are mutilated, his hands and face are blackened from having a fire lit under him, and he was impaled by an improvised spear through the anus.
This is why the Germans considered themselves superior to the communists and talked about "Asiatic barbarity". Sure, the Germans would shoot people, but they weren't gouging out eyes or impaling prisoners through the anus with a spear.
How many atrocities of this nature do you have proof of? Maybe some more contemporaneous murders of Ukrainians? (not Poles, who they had a much worse relationship with)
Maybe something where its clear a Jew was actually involved and responsible for the murder and vicious methods employed? (btw the Einsatzgruppen example you provided doesn't even state this)
I can list some similar things committed by racist white people eg
https://en.wikipedia.org/wiki/Lynching_of_Jesse_Washington
Vicious killings of this sort are clearly not par for the course for white racists--just because a few happened doesn't make it a trend or something white racists are even prone to.
In any case, Germans manufacturing propaganda about Soviet Jews killing Ukrainians is described in Felix Landau's diary. This happened around the same time as OSR 24 so is much stronger evidence than your single example of Soviets viciously killing a non-Ukrainian twenty years prior. You're gonna have to do better than this to justify stories of the Jews going around nailing children to walls and murdering people with hand grenades.
More counter evidence: we know that the Nazis didn't give a hoot about any dead Slavs, as typified in Himmler's 10,000 Russian females speech,
You used a term in your post "Asiatic barbarity". Indeed the Nazis considered this a real thing. We can see this in the 'Severity Order' discussed earlier which talks about the "Asian Influence"
Der 'Reichenau-Befehl' über die 'Sühne am jüdischen Untermenschentum'
www.ns-archiv.de
"Go beyond the traditional one-sided soldierhood" what does this mean
Ah, not feeding POWs? Indeed the majority taken died in the first year, 2 million people maybe. They could have been put to work no? Concerning this mass dying out Himmler said it was "by no means regrettable from the standpoint of lost generations but is deplorable now for reasons of lost labor"
As usual, the revisionist argument backfires--Germans obviously didn't care about any 'poor Ukrainians', but they were eager to find ways to better justify killing of thousands of Jews . Justify for whom you might ask? Likely the various occupied people, regular Wehrmacht soldiers and even SS men who might not be enlightened enough to understand the necessity for such actions. Later on, when they started killing women and children en masse, the reasons changed to "Not allowing avengers to rise against our children."