Much of the debate on WWII Soviet related intelligence is dependent on which Russian spys and spy masters one decides to believe. Defectors have less credibility IMO due to motivation (financial). I suggest reading interviews and information about Lt. Gen. Vitaly Pavlov, particularly his interviews with Svetlana Chervonnaya when researching accusations Americans being "Soviet spys" such as Hopkins.
Actually, no it is not.
Over the last quarter century, a lot of hard evidence has come out about Soviet espionage. And a lot of it from the KGB itself. And then through releases of previously classified material, like Venona.
Heck, a great deal of this information is available for download!
KGB DOCUMENTS ON-LINE - KGB documents online
Then we have Mitrokhin Archive, the Vassiliev Papers, and huge amounts of other data released over the years. Trying to claim that the "truth is being hidden" is simply ignoring fact and following conspiracy theories.
I for one follow facts. If Hopkins was a spy, I think there would be evidence by now. If the Soviets were really behind the US having to enter the war, there would be facts to support it. If the Apollo landings were faked by NASA and Hollywood, we would have facts to back this up.
Do I think Hopkins was a traitor, he may very well have been. But that does not mean he was a spy. And I have heard the Operation Snow theories before, nothing new there. From all reasonable evidence, it appears that there was such a project, but it ultimately made absolutely no difference at all.
Japan wanted the Philippines. The only way to stop or delay an American attempt to retake the islands before they could be secured was to attack the fleet and facilities at Pearl Harbor.
Period. In reality, the Japanese could not have cared less about Hawaii. They were after the Philippines.