This is not "Russia's viewpoint", but a narrative to advance their ambition of enslaving again the roughly 100 million people who became free after the USSR collapsed.
The Russian viewpoint is that Eastern Europe would be much easier to conquer if they were internationally isolated and could be picked off one by one like in the 1940s. The current war against Ukraine is an excellent example of this; international cooperation is a leading reason for the failure of the invasion. All the complaints about NATO lead back to the fact that for Russia it elevates the cost of invading Eastern Europe. Without NATO, they would face only limited conventional forces in Poland. With NATO, an attack on Poland go as far as activating American carrier groups or even a nuclear response.
The Russian viewpoint is that Eastern Europe would be much easier to conquer if they were internationally isolated and could be picked off one by one like in the 1940s. The current war against Ukraine is an excellent example of this; international cooperation is a leading reason for the failure of the invasion. All the complaints about NATO lead back to the fact that for Russia it elevates the cost of invading Eastern Europe. Without NATO, they would face only limited conventional forces in Poland. With NATO, an attack on Poland go as far as activating American carrier groups or even a nuclear response.