I understand your points, however the families of the victims are pleased with verdict and the no-nonsense military panel rendered the proper verdict, IMHO.
If this terrorist, mass murderer is not the candidate for death, then I don’t know who is.
IMHO, the sooner he learns there’s not 72 virgins awaiting him, the better.
Justice for the survivors of the deceased and injured is good as well.
There will be (false) hysterics in Islamic circles when (if) he is executed before he dies of old age.