I'd be cautious about taking media reports at face value. We were lied to about the situation in Iraq, Egypt, Libya, Syria, etc prior to attempts at overthrowing the governments. During the Clinton administration, we intervened on behalf of Albanian muslims against Serbia. Again, one-sided media accounts provided the justification.
Blaming Putin for everything is convenient but overlooks the fact that the west fomented or at least supported the coup against the former Ukranian government. It was a direct challenge to Russia and Putin, expanding the EU and at some point inevitably NATO directly into Putin's back yard. The idea that he would just accept this degree of provocation without responding was foolish. Don't poke a hornets' nest then whine about getting stung.
It's puzzling that we support these separatist movements all over the world, provided they are backed by radical islamists or in the past by communists. The separatist movement in Ukraine however is regarded as illegitimate. We imposed a no fly zone over Libya when Ghaddafi did exactly the same thing the Ukrainian government is doing, ie attack separatists using air power. We drew red lines and criticized the syrian government for the same thing, attacking separatists. No whowever, the separatists are russians, not islamists, and suddenly our approach is the opposite. Puzzling.