The US is a country with the strongest Imperial streak in the west, that is true, but youre still comparing apples to oranges. The Russian brand of imperialism is something from colonialist times, and involves eradicating entire populations, nationalities, to replace with their own. They forcibly resettled over 20 million people last century (or maybe that was just Stalin), countries with rich history which simply do not exist anymore. And the Russian society allows this, because the imperialist mentality is so prevalent that the state gets away with it, because they cannot do wrong, and because the mental slavery of a large part of the population is unshakeable.

And just because these conflicts existed doesnt mean imperialism guides everything. If it did, and the US practiced full imperialism they would own half of middle east by now, and millions of arabs would be dead.