Story is that Moscow-backed separatists shot down a random plane flying over Ukraine. Apparently, Putin is out of control and ordering people to shoot down planes.
Missile downs Malaysia Airlines plane over Ukraine, killing 298; Kiev blames rebels - The Washington Post
Seriously though, what does Putin have to gain by downing this plane? Since basically the whole world is already against him on the Ukraine issue, there is no upside to perpetrating this heinous act. However, since the attention of the world has subsequently been diverted by the happenings in Gaza, the fascist government of Ukraine would have much to gain by doing this and blaming it on Putin.
Believe what you want, but these types of situations are never what they seem to be to the ordinary person.