Hey, bombur, lot of inspiration here [img]smilies/smile.gif[/img]
Yet I deem you err ascribing for the captive Noldor to be orkish forefathers. At the time of the war of the Jewels there already were orks in existance, whatever their origin. Still more Melkor is not a Vala at the time, but Morgoth Bauglir, and is stated to have less powers and abilites as he had of old.
As concerning Maiar unable to have children... well, you yoursels mention Luthien. And who was her mother?
I think you'll find it helpful to look on
Mithadan - origin of Orks thread as well, for I know you've already plunged through
Orcish Fèar one
As for the especial hate of elves towarsds orks, I made similar argument myself once. It looks psychologically consistent.
Yet as a conclusion, the whole thing (Silm) is presented as mythologies, legends and history, i.e. not "scientifically" exacted truth, but as bunch of differen recorders' opinions, beliefs and so on. WE may speculate that some guys at Valinor knew better, but sindarin records show otherwise.
Average Alexandrian citizen of II AD thought the earth to be flat. Ptolemaios (forgive possible mispelling) knew better. What is average citizen's record was preserved and not latter's one? I mean to point that in this case "wastebasket" material may be taken into account as a different source, miraculously preserved in the same said basket. The gaps even including those are so vast, it even adds to the flavour of "realness" of JRRT's work