Zigzag gets it wrong again - he never tires of this! Cain killed Abel out of jealousy because God looked more favourably upon the works of Abel, and God condemned him to wander the Earth forever, and to be unharmed by any man. Classic sibling rivalry, the less favoured child. Nothing to do with worshipping his own way, indeed Cain is mentioned only briefly in Genesis Chapter 4, before and after which there is no record of Cain.
