It's clear that Putin sponsoring war criminals in Eastern Ukraine with finance and weapons, and as results 298 innocent people was killed in plane crash.
I don't believe that Putin is directly responsible for this act but he made this possible and as sponsor of this group he is also responsible for this act of terrorism.
Ummno. Right now it looks like its most likely a SAM from the Ukraine Army, IF there was a SAM missilie at all that shot it Down. Could be an airplane from NATOs Black Sea fleat, they apparently had a wargame Down there same time..