LOLLOL. No offence to them,but that not true. This whole "Voldemort going insane" is a thing solely in the films,not in the books. He was perefectly sane in the final battle in the book,evil,yes,but sane. He always killed people,that;s not something that not new. The only reason they say he's crazy is because he's punching Harry in the movie. A very unloyal part.