
This is manly a religious question, but why did Cain kill Abel?
I'm asking this because in my religion(Islam) Cain killed Abel because, Abel was meant to marry Cain's sister, but Cain was in love with his own sister so he killed Abel so he won't marry her. Is it the same reason in Christianity? Because I've saw some art about this matter saying that it was a jealousy matter(because Adam prefered Abel over Cain or something)