At the risk of "whatabouting", think of the protest in Iran. Police do kill protesters, and not by chance or when things get out of control, they do kill them by the hundreds and those arrested get badly beaten, again not just one or two cases, but as an official method of control and punishment without trial. Why do you think the women there are risking death when protesting? Why do you think they would rather risk dying than living under the Ayatollahs? If you find the answer, you will be one step closer to understanding Ukraine.
Because they were paid from the funds of the US State Department, like you when you jumped on the Maidan? 
The riots in Iran followed exactly the patterns of color revolutions, and enough about that here.