Ukrainian internal politics are twisted, to say the least. Various politicians in the past have seemed quite willing to switch sides at the drop of a hryvnia, Ukraine itself has an ethnically mixed population, you can't always tell by the language spoken (i.e., Ukrainian vs. Russian) just who is who when it comes to loyalties, and the reason for the current unrest seems murky at best. There's a lot of talk in the media about "freedom" and cleaning up corruption, but it actually seems a lot more like one group of special interests was lusting after the opportunity to make money by aligning with the European Union while the other group was lusting after the opportunity to make money by sticking with Russia. In other words, one group of wannabe corrupt politicians decided to boot the already corrupt politicians out. No matter who gains control in the end, the average Ukrainian's everyday life is unlikely to improve much, at least not in the short term.
As for the billion dollars in aid that John Kerry just promised the Ukrainians, why does the above image immediately come to mind?