God kills people because they are bad. The bible tells us so.
Amos 5:21 I hate, I despise your feast days, and I will not smell in your solemn assemblies.
God, being so infinitely clever, keeps his flock guessing. How is going to kill us today? Like a Wheel of Fortune. Disease? Apparent accident? Seemingly murder?
A famous man once said (I cannot recall who) "You spin the wheel and takes you choice'.
Honestly, for a mere $100, to take the 'Slow Death by Disease' slice off the Wheel of Death and replace it with a free pass is quite the deal.
Isaiah 45:7 I form the light, and create darkness: I make peace, and create evil: I the LORD do all these things.
Amos 3:6 Shall a trumpet be blown in the city, and the people not be afraid? shall there be evil in a city, and the LORD hath not done it?
Numbers 21:6 And the LORD sent fiery serpents among the people, and they bit the people; and much people of Israel died.
Matthew 10:34 Think not that I am come to send peace on earth: I came not to send peace, but a sword.
Matthew 10:35 For I am come to set a man at variance against his father, and the daughter against her mother, and the daughter in law against her mother in law.
Matthew 10:36 And a man's foes shall be they of his own household.