The Evil of Sandbagging

Why was Cain so evil and wanted to kill Able? We all know the story, but do we really understand it. God hated Cain and desired to wipe away all the decendents of Cain because the son of Adam and Eve was lazy, manipulative and wanted as much as possible for the least amount of effort. And in that way, evil enters our world. God hates lazy, loser people like Cain.