The notion that God "executes" people is absurd, and, frankly, an argument that is beneath you. Everyone dies. No one is promised another breath. No one. To act like people die because they are "good" or "bad," "Christian" or "atheist," or whatever other qualifier you want to apply, is a ridiculous premise. In light of the above, it is equally ridiculous to argue that God caused someone to die "young," "before their time," or "tragically," as we define those concepts.
God doesn't "cause" death. Death is a part if life, by virtue of man's inherently sinful nature. Good, bad; young, old; healthy, sick - it doesn't matter. You and I will die. We know the why. And, although important to our families and friends, the when and how are irrelevant in the overall scheme of things.