Without a doubt, Klein will love knowing that he will be one of the most controversial and invoked figures in history, controversial to an extreme. He will be regarded as either a villain or a saint, perhaps even both, but many peoples. Movies and books and shows will be made about him, each one more flattering or scathing as the next. But just like the man said, "Nothing ever ends" and that means his legacy, with all its controversies and heroics, will never end either.Klein has practically immortalized himself forever with his actions. People hundreds of years from now will be talking about Klein, I assume, as he had a key part in almost every war from the World War to the Final War.
He might as well invoke what Jean-Luc Godard wrote in Breathless: "To become immortal...and then die."