The Importance of Abel and Seth

The Bloodshed of Abel wasn't because of Cain Murdering him persay it was because he was of a Jealous spirit and that spirit he had was of a Demon spirit. Cain wasn't Eve's Biological child he was given to Eve to foster or to adopt.

 Because he was of a different biological parent. The Heavenly Father already had thoughts against him because he wasn't supposed to be a part of the Human soul and spirit like Abel was. That's why Cain was told to take care of the vegetation/ the farming and NOT to have supervision of the Animals. The Same blessing that was placed apon Adam was placed upon Abel to tend to the Animals and to Supervise them. I believe that Cain was a offspring of the Fallen Gregori/Those that were created first with a Human soul or spirit 

(unlike Adam and Eve).