The West's cavalier approach towards post-soviet Russia is well known and debated ad nauseam here and everywhere (NATO expansion, etc, etc...).
What is much less talked about is the West's cavalier approach towards Ukraine itself.
Dangling the economic carrot of the European Union in front of Poland, Bulgaria, Serbia is not a big deal because those nations are much more ethnically, nationally and linguistically cohese.
But dangling the economic carrot of the EU in front of countries like Ukraine and Belarus is criminal because you will inevitably polarize and eventually destabilize the fragile ethnic-linguistic balance of those two nations.