God doesn't grieve over the dead, because God doesn't understand death
There's a curious paradox in the attitude of mind of those who object to death only to lay the blame for death at God's door. If there's no God then blaming him is irrelevant. However if there is a God then that God cannot believe in death in human terms because almost any conceivable God believes you can't kill the spirit. God believes in eternal life. That's why it's so hard to pray in order to save someone from death. God doesn't think of things in those terms so we're talking at cross purposes. The way God sees it, one day we wake up and the world is no longer there. But we don't stop. And in that there's tragedy of sorts as well as blessing.