Duuring, according to you the fact that "There are even Russians fighting on the Ukrainian side" is sufficient to reject the expression "Western Ukraine" to describe the western side, which is both geographically and politically western. And yet you are implying that the guys fighting the Western Ukrainians are "Russians" and that there is no civil war, as if all Ukrainians supported the western side. So basically you attacked me for something you did yourself in a more blatant manner, for I never said that there is only Ukrainians from the West on the Western side.
This war is substantially both a civil war and a war between Russian interests on the eastern side, and EU/NATO interests on the Western side. If you believe that all the guys fighting Poroshenko and his friends are Russians, you must have been brainwashed. I can admit that some Russian troops are probably fighting alongside local separatists, but saying more than that would be silly.