You mean trade between powers that shared a boarder at the time as well as a tentative peace treaty? The Soviets were absolutely not supporting the Nazi regime and their only mistake was not immediately arming German communists and promoting revolution after the Reichstag Fire.

But even then, the good relations the NSDAP shared with British and American industrialists would have likely seen that leading to the war starting with the West forming a coalition against the Soviets which the USSR absolutely was not prepared for.

Also the Soviet/German treaties were some of the last to be written, the western nations also signed non-aggression pacts with Nazi Germany.