Both sides in the Ukraine mess are using deadly force, it’s not a protest, it’s nasty violence. The gas bottle bombs and bricks the protestors throw are as deadly as bullets. The cops retaliate with snipers to try to shoot the bomb throwers. Neither side wants to lose or back off. The US, European Community can’t stop it. Maybe when the Olympics are over, Putin will send in his army and offer to mediate.
If Putin sends his barbarians in - it will be all-out war. Ukraine remembers too well the suffering under Russians. The whole revolution is about being as far from Russia as possible.