Ukraine crisis has a long history, we're only witnessing and recalling the last 40 years or so. Putin views Ukraine as a country which should not exist at all. This is a position that Stalin took almost a century ago before causing 5 millions Ukrainians to die from starvation. We have to understand this: West can not make Russia to change this view. With our without the support of West, whether Ukrainians want to join EU/NATO or not, no matter what West or Ukrainians do, Putin will never leave Ukraine or any other Brezhnev doctrine[1] countries alone.