[allies and axis] who was the enemy of whom

The Flying Rodent, he of the battle fatigues, opines or allows to be opined:

Obviously, this depends on whether you think the Russians could've fought off the Nazis without Stalin's ruthlessness, inhumanity and propaganda.

Well that's a moot point, you know. I mean, who was actually the enemy of whom? To start with:

Lend-Lease was the most visible sign of wartime cooperation between the United States and the Soviet Union. About $11 billion in war matériel was sent to the Soviet Union under that program.

While this was occurring, on August 25, 1939, the Swiss periodical Revue de droit international published the text of a speech Stalin delivered on August 19 to a closed session of the Political Bureau in Moscow. He was quoted as follows:

It must be our objective that Germany wage war long enough to exhaust England and France so much that they cannot defeat Germany alone.... Should Germany win, it will itself be so weakened that it won't be able to wage war against us for 10 years.... It's paramount for us that this war continues as long as possible, until both sides are worn out.

Whether or not Stalin planned pre-emptive attacks in Europe, as Rezun claimed, war was certainly anticipated at the least:

In general, the Soviet media denied rumors of troop concentrations along the frontier. The defense committee had been secretly transferring combat divisions there since the summer of 1940. In April 1941, the Ural and Siberian military districts were ordered to release more formations.

And yet the massive negligence in preparing for the war is puzzling:

The Red Army had, for security reasons, opted for cable communications over wireless but in "something approaching criminal negligence, the telegraph lines had been left unprotected on the night of June 21." With their easy disablement by the German forces, intelligence could not be shared. Armies vanished. The Commissariat of Defense lost contact with 10 of 26 special trains that had been sent west. The slaughter was horrific.

Added to this was the British leadership's fuzzy attitude to "the enemy":

As early as 1934 British leaders of conservative party had adopted a policy of giving Germany a free hand in eastern Europe.In Nov1937, Lord Halifax met Hitler ,told Britain would not oppose if Germany carried out expansionist polices in eastern Europe.Later British ambassador in Berlin Neville Henderson gave similiar assurances to this effect.

... coupled with the role of Allied firms in Germany throughout the war:

GM and Ford, through their subsidiaries, controlled 70 percent of the German automobile market when war broke out in 1939. Those companies "rapidly retooled themselves to become suppliers of war materiel to the Germany army," writes Michael Dobbs in the Washington Post.

The Soviet Union had certainly been well involved with the allies more visibly and had been persuaded to attend the Bretton-Woods conference where Keynes and Harry Dexter White dominated, White accused of collusion with the Soviets:

Defecting Soviet spy Elizabeth Bentley, on July 31, 1948, told the House Committee on Un-American Activities that White had been involved in espionage activities on behalf of Soviet Union during World War II, and had passed sensitive Treasury documents to Soviet agents. Bentley said White's colleagues passed information to her from him.

So whatever was really going on and whoever was financing whom, over 20 million soviet people died, in an estimated overall toll of 48,231,700 during a fabulous time for wartime profiteering, which never seems to end, even today.

Lovely people, our leaders and financers.