Ukrainian so called government is just doing what they are told by the US.
Political (and may be phisical) life of those "ministers", "prime ministers" and "presidents" fully depends on their success in defeating and depopulating Donbass (after they lost Crimea).
Washington doesnt need western ukraine, the US want to get south east resources and to cut russia off europe.
That reminds me of iraq WMD.
Lying, denying obvous reality is old tactics.
But this time it looks more like histerics.
Either they have some secret tricky plan or it's just an agony.
Let's wait and see