[rchaud]

Not trying to defend Russia in the least, but isn't their fear more about Ukrainian accession into NATO rather than the possibility of joining the EU?

EU membership isn't the golden ticket it used to be. Russia basically had an inside man in there for years with the Orban administration in Hungary. Member nations like Greece, Malta and Bulgaria also seem to have experienced more brain drain to the higher income countries in the bloc than they have in economic and industrial development.

[pllbnk]

My guess is as good as anyone's. But I think NATO was used as an excuse for war because it's a military (although defense) alliance. It would be impossible to justify war for country joining the EU.

As for the golden ticket metaphor, I agree, but when the country is so economically and institutionally behind than the rest of the EU, this would still benefit them a lot. All Eastern countries experienced big emigration but a lot of the citizens previously having emigrated are now returning.