> which is responsible of downing MH17 and many more crimes

{{Citation Needed}}

I googled it and all I see is that the Ukrainian government pointed the finger in their direction. However the Germans are blaming the Russian government's military forces in the region.

Seems like an organisation of Ukrainians and Russians, likely financed by Russia, fighting in the occupied/contested region of Ukraine.

Have to say if they did or did not down MH17, nobody can be too sure either way. However realistically it is hard to believe a rag tag group of "terrorists" could operate a modern anti-aircraft system such as the Buk missile system.