My knowledge of the situation is basically to the simplified "Pro Russia vs Pro EU" sections. Is there anything you could link to or could you explain in a little more detail how this started and what the actual divide is caused by other than how the protesters have been treated? I can't find anything much more than "Pro Eu vs Pro Russia" and "People are dying everywhere. Here's a bodycount and pictures.".
My knowledge isn't much better, though ShÃ nwÃ ng has briefly touched on some of what I am aware of (See: Draconian laws).
Some of the tension relates to Yanukovych being what amounts to a handpuppet for other powers (especially apparent when, during the recent chaos, Yanukovych was often interrupting meetings with his advisors or the like to try contacting Putin to ask him "Wat do"). While this blends in with the Pro-Russia / Pro-EU* somewhat, it's an issue both sides aren't exactly thrilled with.
Some of the tensions relate to the fact that much of the nation never quite realized it left the Soviet Union, with there being fairly credible rumors of political activists (all the way up to 2013) disappearing from places like hospitals to be found dead in the woods many miles away (often beaten into a bloody pulp).
Some of it's that the Ukraine's economy has been rather shaky and unstable even before the upset caused by the protests. Several nations have already begun seriously contemplating the Ukraine Defaulting a matter of "When" and not "If" (and a lot of those "When" scenarios are being answered with "Much sooner than any of us would like").
To refer back to *, while Pro-EU and Pro-Russia have generally been seen as the most vocal sides in this engagement there are
a number of other political ideologies (as well as both radical / moderate divides within aforementioned -EU / -Russia groups), along with some ethnical concerns as well.
Unfortunately I wasn't looking into this until just after all of this started (and much of what I've heard / found has been only moderately more substantial than the above) so I can't give a full-on rundown.