Apparent killing (of anything) is neither okay nor not okay. If there is apparent killing then there is apparent killing. If there is apparent justice then there is apparent justice. The appearance of one separate being doing something to another separate being is not proof that there is separation.
There is only God. God is neither just nor unjust. God is neither merciful nor merciless. God is everything.
Although the illusory “me” thinks that it’s the center of the universe, none of this is actually about “me.”