> If God is the first cause of the physical universe, then his existence is necessary (in the philosophical sense) and therefore changeless (in the philosophical sense) and therefore eternal (as his existence is necessary - and he exists entirely apart from time).

What nonsense. The whole notion of a first cause itself is nonsense let alone the first cause being something as complex as an intelligent being when the very reason you'd propose a first cause to begin with would be that you couldn't accept that something always existed.