You can disagree - but the evidence is pretty unequivocal. There was never mention in any of the decision making bodies of any context that it was a primary motive. What we have to go on was Stalin's paranoia.

It was very well documented that the entire push of the United States government was to involve Russia in the pacific theater. Major concessions had been given to get the Stalinist government to do so. While there certainly were hawks that viewed this as opportune to keep the communists in bay, the documentary evidence drives to the opposite conclusion.