Uhm.. include what??
And since we're staying on that subject...
- Saruman bred the Uruk-hai by "mixing" with men (not sexually OFF COURSE lol), and I'm quite sure it was magic involved right?
- Sauron bred the Black Uruks - BUT... how? Magicallly yes... But if not mixed with Wargs that that big Tolkien fan site says, then how/with what?
Anyway, dont really matter, the mod wont state what they are, only what they are called 
First of all, Saruman didn't make the Uruk-hai. Apparantly he received some orcs and uruks from Mordor, and with that, he bred on till he created a better version, the Uruk-hai.
Second of all, Sauron didn't ''create'' anything. His orcs were descendants of those created by Morgoth, and he (or so the latest clues say) made the first of them by corrupting and torturing men. (this is always debated, though Thorongil's essay made alot of sense to me, and he is for that argument.) Nobody except Eru Iluvatar had the power to create. Morgoth could only corrupt and thus develop mockeries of the true creations.
And clonecommand, Tolkien was indeed a christian, but was very careful not to mix his christian beliefs into his work. He absolutely hated all forms of allegory and saw his work as something that wasn't connected to his religious beliefs. Read any biography and you'll see this confirmed.
That Tolkien site just makes no sense at all, looks like a bunch of fanboy gibberish to me.