No. Foreign mercenaries killed the protestors. That's how revolutions are done, it's a ratchet event that doesn't allow the history to wind back.
Once there is blood spilled - full force ahead, no turning back.
Btw, you are forgetting that Ukranian police was torched by the protesters using molotov cocktails.
And that's weapons. According to your logic Police had the right to shoot, but they didn't.
They didn't because Yanukovich ordered not to shoot at the protesters.
You really need to do some reading pal.
Or try attacking police assuming you are in a USA - that will teach you a lesson about what happens in a real democracy when police is attacked. And I fully support such a response.
