Of course the appropriate response would be to assassinate Poroshenko. Russia will not do that. Russia will do nothing. Russia will say a few words and then Zakharchenko will be forgotten.
How about working out who specifically did this first... many here are blaming Poro, but it could just as easily have been the CIA, or indeed British Intelligence...
Escalation is not the solution... especially as elections approach... Poro wanted Trump to visit to boost his chances of election and he sent Bolton instead... a Russian invasion would be a god send for Poro because he will be fighting the evil Russians... defending all of europe from communism...
It is better that Poro is removed by the Ukrainian people and someone else gets elected... if the new person wants to talk then that is good... if they want to continue the artillery and bullshit, then voting in the donbass can start to either become autonomous, or join the Russian federation... or live under constant bombardment from what should nominally be their government in Kiev.
The Americans have already proven to be fuckin idiots... the took out Saddam and removed the Sunnis from power in Iraq because they were afraid of Iran... which meant democracy for Iraq so the Shia majority have taken over and are friendly with Iran. They funded extremist terrorists in Syria because they feared that Assad was too friendly with Iran and now Iranian forces are actually in Syria helping Assad becoming quite critical to his future position... along of course with Russia.
So US moves to push Iran back have actually allowed them to expand their influence in the region they never could have dreamed of without US interference.
In the Ukraine the US took out a leader that was in no way pro Russian... he just recognised the Russian and Chinese deal was way better than the EU offer, so they overthrew an elected government in the hope they could kick the Russians out of Sevastopol and park their NATO ships there... but they didn't plan it very well and Russia stepped in and made the best of a very stupid and dangerous situation and made the best of it...
The huge irony of course is that the Crimean penninsula has changed hands many many times... by the blade of a sword, the muzzle of a gun, and the annexation by a leader of a communist country (Krushchev). They had several referendums that were totally ignored by the various governments in Kiev where they wanted autonomy, but now they got a real free vote and they made a choice and the west claims it is illegal and void... well why should anyone at all trust the west if they are going to ignore all of their own morals and values because they don't conform to their current interests.
BTW Vann... fantastic post... Putin is still a moron but he is doing the right thing... keep it up buddy...