So on that, that's a pretty big thing that Christianity already covers. Christianity in a nutshell is all about Gods love, and basically His love gave humans the greatest gift of allowing us to have free will, so in short we control our own paths and we control our future of humanity, the only thing we can't control is our final destination. Killing God really doesn't do much for spreading that message given that it's already the whole point. Just wanna clear that misconception
Idk how it is on the Judeo side for I am not Jewish.
Okay, first off, there are neuroscientists and philosophers who say that free will is rather an illusion, and the unconscious mind pushes us to do things, rather than actual conscious deciding. Free will may not exist and may be again, an illusion.
Second of all, there are many flaws in gods love. If he loves humanity, or is all loving, why does he show hate at times and even send people to do bad to hell instead of try to make them better? Also, isn't god too human to be a supreme entity? I am sure omnipotent, transcendent beings would not be like how people describe at least Judaeo-Christian God, who has too many human traits.
I could go on, but I don't want to delve too deep. Still, God is just a psychological need of people, not an actual being, and people's devotion to such a nonexistent being has lead them to do bad things and hateful things towards others, which, by the way, they say God approves or justifies, which contradicts the all-loving part. In fact, there is probably not need for a god altogether for many reasons.