Not in those years. They had just been defeated by Germany and forced to sign the Treaty of Brest-Litovsk. They were gripped by Civil War and economic collapse. They were absolutely incapable of mounting any kind of serious threat to the West. The threat was ideological. The West was concerned about agitators, people who might try to rile up the workers and the lower classes. Our leaders were threatened by "dangerous ideas," not by any direct bona fide military threat.
The link contained more information:
According to Barbara Anderson and Brian Silver, historians such as Robert Conquest made the most primitive of errors. They asserted that these Cold Warriors overestimated fertility rates and underrated the impact of assimilation, through which many Ukrainians were redesignated as Russians in the 1939 census, confusing population deficits, which included unborn children, with excess deaths.[58]
Historians such as J. Arch Getty, Stephen G. Wheatcroft, and others, insist that the opening of the Soviet archives has vindicated the lower estimates put forth by the revisionist school.[74][75] In 2011, after assessing twenty years of historical research in Eastern European archives, American historian Timothy D. Snyder stated that Stalin deliberately killed about 6 million, which rise to 9 million if foreseeable deaths arising from policies are taken into account.[76][77] American historian William D. Rubinstein concluded that, even under most conservative estimates, Stalin was responsible for the deaths of at least 7 million people, or about 4.2% of USSRs total population.[78]
Some historians believe that the official archival figures of the categories that were recorded by Soviet authorities are unreliable and incomplete.[1]
Of course, it's still bad. I never denied that. But that's not really the issue in question here. We're asking whether or not it warranted a response from the West or if the West should have considered it a threat to their security.
Excess mortality in the Soviet Union under Joseph Stalin - Wikipedia
It was internal to the Soviet Union, and the fact is, many Russians also suffered under the same government. It wasn't a case of the Russians doing something to Ukrainians, but rather, the Soviets (led by a non-Russian) doing stuff to all nationalities within the Soviet Union. That doesn't change anything or make it right, but I don't see how it's something that can be blamed on "Russians."
The map showing their military occupations occurred around the time of WW2, when Germany was the primary aggressive power at the time. But the USSR could recognize that they were a prime target.
We can't be too certain of that. We've seen aggressively expanding countries in the past, such as Britain and France. They expanded all over the world and imposed their will upon countless nations and peoples - and our government was ostensibly okay with that. And they were, at some point early on, considered a potential threat to our security, but we eventually learned to work with them and cooperate with them to the point where they didn't have to be considered a threat anymore.
If we were hostile to them, then sure, they'd be hostile back and threaten us, but if we were nice to them, they were nice to us. Whatever else they were doing in the world didn't seem to matter, as long as we had a cordial relationship. We were not inclined to get entangled in foreign wars or international intrigue.
But it didn't just stop there. We propped up figures like the Shah of Iran, who imposed terror, torture, and murder upon his own people, yet the U.S. was nice to him and thought of him as a friend and ally. Or take our nice and friendly relationship with a medieval regime like Saudi Arabia.
The argument that "we oppose them because they oppress people" just doesn't hold any water. We may oppose them for many reasons, but not for that. Never for that reason.
An organized defense against any possibility could be argued as reasonable. If you're arguing that the USSR and Russia is some kind of special case which warrants an exceptional policy directed just at them, I might find reason to question that.