EU in a current form is enemy of Russia, there can be no doubt about it. EU wants to break up Russia, eliminate completely Russian influence in the post-Soviet republics and make Russia its oil colony.
It is thus in Russia's best interests to see the present European experiment with unification end in a dismal failure.
On the other hand, Russia IS a European country too and therefore is not opposed to the European unity as such.
What Putin and many Russians want is to reunite Russia first and then create a true European Union which Russia will join as a founding member and first among equals.
But to reach this goal one probably needs a World War or two...
Which is why I am concerned over the relationship between Putin, Germany and France. France and Germany are both fairly disgruntled over the course the EU has taken; they had intended that they be the power within the EU and all nations simply tow their line. It hasn't worked out that way.
Now we see France (who disassociated itself from the NATO defense from the USSR mission in the late 50's) and Germany where many of the political leaders and much of the population yearn for the good old days of East Germany.
I am concerned over a power play between those three nations to bring the rest of Europe to heel...one way or the other.