EW Bullinger probably one of the most profound biblical scholars, thought so! In fact he's the only Christian scholar to edit the massoretic texts for Ginsberg. To say all Jews don't believe such things is blanket statement. Where's your refernces? I tried to put it in a way you could understand! You wanna debate semantic's? Your telling me the Hebrew tradition doesn't state that they believed in the Nephillim or Geber?
http://www.christian...suss-geneology/
http://www.christian...gy/page__st__30
http://www.jewishencyclopedia.com/view.jsp?artid=27&letter=C
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 ...
The seven generations of Cain, as the brood of Satan, are accordingly represented as types of rebels(Gen. R. xxiii.). While the pious men all descended from Seth, there sprang from Cain all the wicked ones who rebelled against God and whose perverseness and corruption brought on the flood: they committed all abominations and incestuous crimes in public without shame. The daughters of Cain were those "fair daughters of men" who by their lasciviousness caused the fall of the "sons of God" (Gen. vi. 1-4; Pirḳe R. El. xxii.; compare Sibyllines, i. 75). The Ethiopian Book of Adam and Eve and the Syriac Cave of Treasures—both Christianized Melchisedician works based upon a genuine Jewish original—relate the story of the fall of the descendants of Seth as "the sons of God" who had lived in purity as saints on the mountain near Eden,
"He built a city" (Gen. iv. 17) means that "he built a doctrinal system of law-lessness, insolence, and immoderate indulgence in pleasure" ("De Posteritate," 15); and the Epicurean philosophers are of the school of Cain, "claiming to have Cain as teacher and guide, who recommended the worship of the sensual powers in preference to the powers above, and who practised his doctrine by destroying Abel, the expounder of the opposite doctrine" (ib. 11).