Michael Heiser on original sin

I've written posts on Michael Heiser and his book Unseen Realm, and I was at first critical of him as being a liberal theologian, then I felt I should lighten up on him because his book does bring a lot that is of worth in seeing some of the supernatural elements of the biblical narrative/history; but all along I've always had a sense of wariness of the guy. The fact is he just is very shallow regarding biblical doctrine and the overall plan of God. He gets emotional and mocking when discussing certain doctrines (like a liberal theologian). The analogy of faith doesn't seem to be part of his hermeneutic. Being lectured to by him is an obnoxious experience. See here for instance. He's using the fact of infants dying to mock and wave away the doctrine of original sin. He's shallow.