You can debate if the 'Revolution of Dignity' was a good thing or not, but some other country impeaching their leader for human rights violations and holding new elections is a poor reason to invade it. Obviously Putin thought Yanukovych was his guy and if the Ukranians dared to kick him out and have democracy he'd just have to invade and install a new puppet but is that really a coup? Google has:

>A popular uprising is not typically considered a coup. An uprising is a broad, public, and often spontaneous mass movement aimed at social or political change, while a coup (coup d'état) is a rapid seizure of power by a small, elite group, such as the military or political insiders.