Ah, I do so love sociopathic Harry stories. And this one is the best I've read of that ilk. My personal favorite is Harry calling a truce with Voldemort. I suspect that they will get even closer if Volde decides to take Harry up on the offer the trade childhood stories. As it has been pointed out before, they have a lot in common, and having the opportunity to talk peacefully with a kindred soul (male bonding in all it's twisted glory) might help darked Harry, and possibly lighten Tom. I can see this Tom starting to see Harry as the little brother he never had...
If Sirius had just left baby Harry lying there in the rubble, to be found when Hagrid got there, I would agree with being angry at Sirius. But he didn't. He waited until Hagrid, someone he trusted with his life, to show up, and then left Harry safe in his care. He had knowledge at that point of who the traitor really was, and needed to act on it before the rat got away. His only real error was not simply telling Hagrid "I was a decoy. Peter was the real secret keeper." But as Vanir said, Sirius was a hothead, and a furious, betrayed hothead at that.
Please keep up the fantastic work you are doing on this story. I am really enjoying it. Thanks for writing for us.