Yeah, in the early to mid twentieth, that kind of cock blocking against investigating the death off a head of state would have started a war quick as wildfire. Also, the immediate dismissal made by Russia that the recent crash could not have been caused by a "man pad" anti aircraft missile is dubious - the plane was at 31,000 feet
above sea level, not including the high mountains it was flying over at the time. It was well within range of portable missile weapon systems, and remember that IS has stolen tens of millions of dollars to buy on black market and has over-run govt. army installations and looted shit like crazy. The plane has been determined to have broken up at high altitude, spilling some of the bodies over miles and miles. That's not a mechanical failure scenario. That's a missile hit or a planted bomb.