This is an important point.
Some people here are framing this as an EU vs. Russia issue, suggesting we should take Russia's side against the EU.
They seem to forget that Russia sided with the Franco-German axis against us in Iraq, not to mention the fact that they are even more pro-Nuclear-Iran than the EU is.
What we should be worrying about is a future alliance of Russia and the EU against US "unipolar hegemony." We should be encouraging the EU expand to more of "New Europe" in order to dilute the Weasels' domination of the EU.
From a realpolitik standpoint we ultimately kill two birds with one stone: weakening Russia's geopolitical reach and diluting Franco-German domination of the EU.