Many, many rabbis made and are making the case that Cain was fathered by satan. "Cain was also viewed as a type of utter perverseness, an offspring of Satan (Pirḳe R. El. xxi.), "a son of wrath" (Apoc. Mosis, 3), a lawless rebel who said, "There is neither a divine judgment nor a judge" (Midr. Leḳaḥ Ṭob and Targ. Yer. to Gen. iv. 8), whose words of repentance were insincere (Sanh. 101b; Tan.), whose fleeing from God was a denial of His omnipresence (Gen. R. xxii.), and whose punishment was of an extraordinary character:" http://www.jewishencyclopedia.com/articles/3904-cainAnd Adam knew Eve his wife; and she conceived, and bare Cain, and said, I have gotten a man from the LORD. I didn't know that The LORD equaled satan in Genesis Chapter 4.
Please stop posting nonsense on FR.