As horrified and aghast as I am about this MURDER, you are wrong in specific about the capabilities of an individual "BUK' launch type. While this individual launcher / vehicle is designed with a fire-control radar, the system concept behind the original Soviet setup had the IFF (Identification: Friend or Foe) at a different location. The whole system is designed with Russian institutional paranoia and top-down command in mind. This is part of the indictment against Russia and Putin, they gave their surrogates in Ukraine weapons designed for a different mission and MH17 is a wholly foreseeable consequence!
Murder is the right word, they knew what they were doing. They are russian scum.