I think one of the problems may be the light weight of the bomb versus a strong ground wind. Something seemed to move it off target as it got closer to the target and it looked like almost a linear change in trajectory.
A series of mistakes and bad choices led them into that situation. Their last and fatal one was not going home or waving a white flag and walking in the right direction.
If extremists are unwilling to learn invading another country and ethnic cleansing is repugnant then they must be willing to be taught a hard lesson.