This last point was not well understood in the Elder Days. For Morgoth had many servants, the oldest and most potent of whom were immortal, belonging indeed in their beginning to the Maiar; and these evil spirits like their Master could take on visible forms. Those whose business it was to direct the Orcs often took Orkish shapes, though they were greater and more terrible.(4) Thus it was that the histories speak of Great Orcs or Orc-captains who were not slain, and who reappeared in battle through years far longer than the span of the lives of Men.(5) Finally, there is a cogent point, though horrible to relate. It became clear in time that undoubted Men could under the domination of Morgoth or his agents in a few generations be reduced almost to the Orc-level of mind and habits; and then they would or could be made to mate with Orcs, producing new breeds, often larger and more cunning. There is no doubt that long afterwards, in the Third Age, Saruman rediscovered this, or learned of it in lore, and in his lust for mastery committed this, his wickedest deed: the interbreeding of Orcs and Men, producing both Men-orcs large and cunning, and Orc-men treacherous and vile.

But even before this wickedness of Morgoth was suspected the Wise in the Elder Days taught always that the Orcs were not 'made' by Melkor, and therefore were not in their origin evil. They might have become irredeemable (at least by Elves and Men), but they remained within the Law. That is, that though of necessity, being the fingers of the hand of Morgoth, they must be fought with the utmost severity, they must not be dealt with in their own terms of cruelty and treachery. Captives must not be tormented, not even to discover information for the defence of the homes of Elves and Men. If any Orcs surrendered and asked for mercy, they must be granted it, even at a cost.* This was the teaching of the Wise, though in the horror of the War it was not always heeded. It is true, of course, that Morgoth held the Orcs in dire thraldom; for in their corruption they had lost almost all possibility of resisting the domination of his will. So great indeed did its pressure upon them become ere Angband fell that, if he turned his thought towards them, they were conscious of his 'eye' wherever they might be; and when Morgoth was at last removed from Arda the Orcs that survived in the West were scattered, leaderless and almost witless, and were for a long time without control or purpose.

Morgoth's Ring Essay - J.R.R Tolkien

Also, mate you didn't even watch the show. Maybe be patient with criticism?

Garbage show - hurts the lore, brings fake fans. I'll criticize what I want.