I still admit the possibility of a "false flag" operation by USA secret services and the junta in Kiev (at least some forces in it). Note, that until the tragedy with the plane EU officials were not so ready to switch into full scale "anti-russian" mode. It was only USA, Canada and Australia before the crush. But after the crash Merkel's (=Germany's=EU's) rethorics changed drastically. I guess that NSA has so much compromising information about her (considering that they were listening all her phone talks for many years) that she is ready to do what they say, but she had an excuse to not obey fully to USA's order to switch "full anti-Russian" - public opinion in Europe. The MH17 crash cancelled that excuse and she had to obey fully.
At the other hand I just can't imagine ANY reason for Putin or rebels to intentionally shoot down the plane except being very very evil.