Well I obviously dunno the history but according to her the russian speaking population in the east has never been well liked by the western ukranians. For example if u were heard speaking Russian in the west they wouldn't even look at you or give u the time of day. So theres obiously some long standing beef.
Considering that the previous government, which fell to a violent overthrow, garnered much of its support from the East it's easy to understand why.
The fact that one of the first acts of this new self-appointed government was to try and ban Russian as a minority language, which most people of the Eastward part of the country speak, it should be easy to understand.
Also, this self-appointed government is using the military against those in the East for doing the exact same thing that brought them to power, in light of the fact that Yanukovich did not deploy the military against the Maidan protesters you can understand why the East would hate this self-appointed government.