At first I thought maybe it was like the EgyptAir flight, a suicidal pilot. I dont believe that anymore..if either of these two pilots wanted to off themselves they would have done it in the China Sea, no need to turn off the transponder, just scream out Allah Akbar and be done with it, no need to be all secretive
Maybe it was a test run. They wanted to see if they could do it but failed and it crashed. The rest of them are going to have to go back to training.