If it is done at the behest of a violent, armed mob, then yes, IT IS A COUP.
Nonsense. Just because some group of people is rioting doesn't mean that the parliament of some country is so cowed that they vote what the group wants. You act as if the Ukrainian parliament members are a bunch of wimps. Couldn't they just as well voted to have the military crush the dissidents? Of course they could have, but they didn't.
In case you haven't noticed the average Ukrainian girl isn't as wimpy as you claim the members of the parliament are.