Also.. in Superman II he actually doesn't kill Zod. They cut the scene in the theatrical release but it was supposed to show that they were basically being confined back into the Phantom Zone.
So he doesn't kill Zod in a cut of the movie that wasn't released in theatres ? Yeah, I'm talking about the theatrical release, sir. Don't tell me he doesn't kill Zod. He crushes his hand and kills him although he is now completely harmless. He falls to his death. Then Lois kills Ursa and all Supes does is smile, as though premeditated murder is funny.
So, please, don't talk about Man of Steel betraying the titular character.