Divine Morality On Trial: The Killing Of The Innocent Child In The Quran
If you claim to be an angel of death, and you can prove it, then there is no objection. The prophets were asked to follow the Shariah. They did not kill for no reason.
Would u rather choose that your son got killed early on by angel because he would later somehow do shirk and die as a disbeliever and be eternally in hellfire OR he was left alone and grew up and he did became kafir and lived like a major kafir leader lets say and died as enemy of Allah and never ever can enter paradise with you? I think you would rather have your son with u in paradise – am I right?