Even though he had made a The Molotov–Ribbentrop Pact with the Soviets, he had shown hate for the Soviets and especially Communism. This can also be seen in the Reichstag Fire where the Nazis had blamed a communist who had got the Communist Party shut down. So making a treaty with the Soviet Union would have not been on his agenda.
RASPP is an algorithm that given a 4-D contact map, parental protein alignment and a few other parameters will generate libraries with the lowest average SCHEMA disruption.