I'm gonna come right out and say it. What the fuck is going on? The pictures look like something straight out of a WWII movie.
Ukraine's parliament/congress, rejected joining the European Union. By doing so, Ukraine will most likely (continue to establish) close relations with Russia, & could eventually form its own "Eastern European Union".
Also alot (if not, the most infuential) of EU member nations are in the NATO alliance, so Russia most certainly doesn't want a border nation to eventually join such an organization, considering the fact that United States wanted to plant a "missile shield" in Poland, which would enhance America/NATO's capability in a first strike/pre-emptive nuclear strike against Russia. Alaska, rich in oil, really, only represents the main vulnerability of a ground invasion from Russian ground forces.
Also China, though relying on Russia, for its most advanced Arsenal such as "Flanker" jet fighter, is a potential hostile enemy for Russia (see: Treaty of Aigun).
Therefore, Russia could face a 2-front war alongs its borders, of course not now, but more like, 50-100 years from now.
Alot of ethnic Russians live in eastern-Ukraine.
A legitimate reason for the Ukrainians to hate the Russians, despite 2 Soviet leaders (Kruschev & Brezhnev) being born in Ukraine, is that around 2-8 million Ukrainians were killed in an engineered famine during Stalin's reign (holodomor), which Russia has yet to recognize (as a genocide) or apologize for, to the best of my knowledge.
The 2005 orange revolution saw a pro-NATO/EU president (Yushchenko) get elected for Ukraine, but he was eventually voted out and replaced with pro-Russia factions.