They took part in atrocities in the Baltics, but I digress.
Probably should be part of another thread, but which period are you referring to? The evacuation period post 44 or the 41 use of Kriegsmarine sailors to conduct rear-echelon duties?
I haven't read all that much on 41' so feel free to tell me more!
Regarding 44-45, it's why the qualifier of "up to the standard of the Western allies" was added. There were loads of cases of U-boats abandoning floating live sailors after their ship had been sunk and not rescuing them. Of all the bullshit, crackpot defences at Nuremburg, Admiral Doenitz actually made a convincing argument:
His argument was that
a) Rescue operations were usually at the whim of individual ship level commanders, and most of the case the Kriegsmarine commanders did indeed rescue merchant sailors. In many cases, they were even returned as they were not deemed active war participants. Another example would be Admiral Hipper rescuing the sailors of HMS Gloworm.
b) The force structure of the Kriegsmarine meant that the emphasis on A) was even more critical because unlike the Allies, the Germans had no real Fleet in being, the majority of their actions were in U-boats and small clusters of rapid pocket cruisers. Many of the times the ships simply weren't in a position to rescue sailors, like for example a U-boat simply does not have the capacity to rescue hundreds of sailors.
c) The most telling argument is that in the Pacific, the Americans had gigantic fleets, with huge supporting cast of auxilliary ships, hospital ships and even then, orders came from the very top in multiple occasions to not rescue Japanese sailors in the sea. Many occasions arose of F6F pilots doing strafing runs on Japanese sailors in the sea.
So Admiral Doenitz made a very valid point in, "despite having much more capacity to do so, The Americans did the exact same thing we did."
Hence the qualifier of "Up to the standard of the Western Allies."
EDIT - For context, Doenitz was found not guilty of these crimes at Nuremberg , as his legal defence teams had dug up huge amounts of evidence of the allies doing the same, hence all charges relating to merchant sailors treatment, unrestricted U-Boat campaigns and treatment of survivors were dropped by the prosecutors. He was ultimately found not guilty of War Crimes for his leadership and conduct as head of the Kriegsmarine.