If god’s grace makes exceptions for children whose life is cut short, Then murdering children is infinitely good/beneficial in their interests.
If god’s grace makes exceptions for children whose life is cut short regardless if they knew about Jesus or not, Then it would be best in the child’s interest for their life to be cut short, There wouldn’t be a reason to feel sad about a Tragic event such as a school shooting, because under this premise, such event would be infinitely good for them, as they avoid the possibility of living a life where they grow up and are led from salvation. If Children who didn’t believe simply cease to exist then it would still save them from the possibility of eternal torture. If children who don’t believe are sent to hell, meaning they are accountable regardless of age, then (deep down we both know that is wrong) and there would also be no real reason to have an age of consent. Either way I think this is still a significant moral dilemma that deeply puts into question the validity of the moral law of christianity and abrahamic religions alike.