Opposed to them are the Russian empire-builders who have never seen a piece of land they did not want to annex, before, during and after Bolshevik rule. Russia's eternal ideology isn't monarchy, communist dictatorship or democracy - it's universal empire under direct Russian rule, under the pretext of a quest for greater security. We were fortunate that they latched on to Afghanistan and, if the Ukrainians are willing to fight, would be well-advised to provide them with the equipment they need to rack up a serious Russian body count. In Afghanistan, they drew the line at 13K dead. I expect today's Russia has a much lower pain threshold.
All of these people have views we can agree with, such as opposition to Putin's statement that "the collapse of the Soviet Union was the greatest geopolitical catastrophe of the 20th century". They presumably wouldn't agree with Lenin statues still being located in Russian public places. Why is it so hard to conceive of other areas that they might have in common with conservatives, such as opposition to Russian empire-building?
The Russians aren’t trying to rebuild an empire as you suggest, they’re trying to maintain a perimeter fence line to protect themselves from a bloc of countries with a long history of trying to invade its territory. Russia has legitimate national security interests in the Ukraine, and the United States shouldn’t let itself get drawn in to the middle of what is essentially a European squabble.