Of course I would never wish to harm a child, but wouldn't sacrificing my soul to hell to save the souls of thousands of children be noble and altruistic? The families will surely miss their children, but their suffering here on Earth doesn't compare to the great joy they will feel after being reunited with their children in Heaven, right?
I have another question. If those who weren't exposed to Christianity during this lifetime won't be judged for their lack of faith, aren't missionaries doing them a disservice by spreading the word of God? If you don't believe this is true, and you think all men will be judged for their lack of faith, isn't it extremely immoral to punish someone for not believing Jesus is the son of God when that person never had any contact with Christianity during their lifetime?
For those curious, I am a theist, but I am choosing to withhold my religion. Furthermore, I am not advocating for us to start killing children or stop spreading Christianity. These are merely questions that I have come across but haven't yet found an answer to.