That is a completely warped interpretation.
Not least we never allied with Communism. Did the Americans actively support Communism?
Of course the Americans actively supported the USSR. Perhaps you should do some more reading on the subject?
Lend-Lease: How American supplies aided the USSR in its darkest hour
It is of course also worth rembering that pretty much up to the start of Operation Barbarossa that the USSR was in a pact with the Nazi's and they were trading with one another.