So, Su-25 will be Putin's angle on downing of MH-17? Problem with that is US/NATO intelligence sources tracked the missile and could eliminate the Frogfoot as the source of the missile.
US intelligence cannot be accepted as definitive because US is the sponsor of the Kiev regime, which is one of the suspects.
The first question is which type of missile downed the aircraft. The parts of the missile must be found among the aircraft wreckage. It might be a Buk, in which case we want to know its serial number to try and find the route it took from the factory to the aircraft at 33000 ft. and so find who launched that missile. There is some reason to think it might not be a Buk, in which case it will be a larger missile with a longer range and probably a larger warhead. In that case it certainly were not the separatists who were responsible.
If parts of both types are found we know one or more parties are trying to bamboozle us.
Only if parts of neither missile is found can the Su-25 be relevant.