I’ve always wondered if Abraham somehow knew his son would live, from things like him telling Isaac “God will provide the sacrifice” and the traveling party “wait for us and we’ll return.”
And as Abraham knew God, and God violently hates child sacrifice, I have to wonder if that was also a factor.
Can you be willing to do something even if you know you’ll never have to? Can you prove it? I personally think it’s possible.
Regardless, as disturbing as it is to kill your child because God told you to, there’s no question about how blatantly evil it is to do so because another human told you to.