You'll find no argument from me, there.
As included within proof-of-concept test run, it miserably failed. Sour fruit (seriously dangerous to human health) mixed with whatever accomplishments under science and engineering etc., they were able to realize under that system (by hijacking technology from the West at many key junctures).
Setting aside Nature's God (as understood to be, and considered by the founders of the United States and author's of the original Constitution) leaves a yuuge void for authoritarian dictatorship.
Without hard check (built-in resistance) to totalitarianism, while lacking also sense of Liberty as intended by Nature's God, totalitarianism is among logically expected eventualities, the only real question being "how long will it take" to get there.
God let the USSR burn itself that way. Not that He was asking them to do it, but we know this is a universe that allows a certain scope of choice. The fine details of how “free” choices are can be left to the theologians and philosophers to tease apart, but we know choice is an essential piece of the picture.
Anyhow, to play ball with it like the USA did in WWII was purely a matter of necessity. Any further outreach had to wait until the USSR was spiritually ready. When it saw that its cisterns were so broken that it had nowhere else to go (and happily, the Russian Orthodox were willing to step up to the plate, bearing no grudges).
I hope the USA does not burn itself with a de facto atheism. Christianity has a stronger voice in the USA and the USA could avoid such a fate. But Christianity needs to actually be about Christ, to belabor the obvious. It can’t be about men, can’t be about churches, certainly can’t be about globalism.
I think too of how czarism made it easier to slide into the atheist, authoritarian model. The Russian Orthodox had been kowtowing to the czars. That kind of Christianity has a serious problem with its light being under a very ornate bushel basket.
How Christianity fares in Russia will have a lot to do with how Russia fares.