To me, this scene illustrates Anakin's ultimate stupidity. I don't mean him being "tricked," or his mind "warped," but the character being outright stupid. He joins up with the Sith, he knows who he's in league with, and claims to be fighting, almost oblivious to all else, for restoring "peace" to the Galaxy. He's trying to save Padme's life, so he joins up with the man who's been trying to kill her for the last ten odd years, plunged the Galaxy into war, and killed the only man who ever understood him. All of that happened at the hands of a Sith, and it clearly comes back to Palpatine. In short, Palpatine is the reason why Anakin's life is in shambles, and yet he fights to defend the Sith oblivious of all this. That's a stupid character in my book.