nicolaou, I don’t know what the answer is why the God of the Bible is depicted killing children, it doesn’t seem there can be a justification for that. Perhaps those passages misrepresent God? Because there are certainly parts of the Bible that say God wants everyone to live. One of my favourite verses is 2 Peter 3.9
Jehovah is not slow concerning his promise, as some people consider slowness, but he is patient with you because he does not desire anyone to be destroyed but desires all to attain to repentance.
If that’s true, then perhaps everyone will be saved in the end because why can’t God do what he wishes to do?