Andrew Kuchins : Jet 's downing must awaken U.S. , West to danger of Russia - Ukraine war . Focus should be on Russia 's ability to defend sovereignty , not Russian sanctions , he says . He says sanctions over Ukraine 's help to rebels will help Putin whip up nationalism . Andrew Kuchins : Diplomacy needed to de-escalate crisis ; Andrew Kuchins wo n't allow himself to lose face .
Andrew Kuchins : Jet 's downing must awaken U.S. , Europe to danger of Russia-Ukraine war . Focus should be on Ukraine 's ability to defend sovereignty , not Russian sanctions , he says . He says sanctions over Russia 's help to rebels will help Putin whip up nationalism . Kuchins : Diplomacy needed to de-escalate crisis ; Putin wo n't allow himself to lose face .