the simple observation that every 'concentration camp' was liberated by Americans and British, and every gas chamber equipped 'death camp' was liberated by the Soviets.
While it doesn't address the trustworthiness of the Soviets, there is a simple explanation for why that would be the case: because the Soviets attacked from the east, which is where the undesirables were. There are cultural differences between France and Germany, but they are both sons of the Frankish Carolingian empire. Specific French minorities were considered untermenchen, but not entire populations like the Slavs.
Also, the East was "lebensraum" annexed territory, far from the eyes of a German citizenry that might be a bit uncomfortable with the mass murder of millions.
While it doesn't address the trustworthiness of the Soviets, there is a simple explanation for why that would be the case: because the Soviets attacked from the east, which is where the undesirables were. There are cultural differences between France and Germany, but they are both sons of the Frankish Carolingian empire. Specific French minorities were considered untermenchen, but not entire populations like the Slavs.
Also, the East was "lebensraum" annexed territory, far from the eyes of a German citizenry that might be a bit uncomfortable with the mass murder of millions.