1) The Christian god (the one you're referring to by its name, God) can do anything, therefore it can create objective morality. (It's not bound by logic, so the fact that one of its properties may be illogical is irrelevant.) If it can't create objective morality it may be a god, but it's not God.
2) Morality evolves. Evolution doesn't create - morality or anything else.
2) Morality evolves. Evolution doesn't create - morality or anything else.