Well, in your OP you said: "It seems to me that if this God does exist and he is indeed the God of the Christian faith, then he's done himself out of a soul. Now why would he do that?"
The Christian God that I worship didn't lose a soul, will still judge you based on what you did do, did not do and what you could have done after you die, doesn't really care whether or not you believe in her, and it will likely offer you a better seat at the table than many "Christians".
Anyone so limited that they can only spell a word one way is severely handicapped!