He murdered his own flesh and blood to compensate his inferiority and to step out of his brother's shadow. Did he succeed? Not at all! His shy innocence was poisoned by his jealousy of his brother. He was mistaken when he thought that the murdering would free him from his inferiority.
He didn't consider that it's often the most inconspicuous creature that arises to become the next savior. I think of Frodo Baggins (/Beutlin) in "The Lord of the Rings", Bastian Balthasar Bux in "The Neverending Story", .. when the came had come they did what they had to do.
The evilish brother didn't use his chance. He is lost.