I have a truly impossible time believing this guy got his degrees from an accredited university (if from anywhere at all). His writing is not that of someone who spends a lot of time in study, and his understanding - of the Biblical passages he does cite, of human nature, of his special duties as an alleged Bible teacher - are shallow as a teaspoon.
Let's take a quick look:
You wouldn't know the true message of the Christian Bible if it fell on your head falling out of a 40th storey window, you little eunuch!
I doubt Demarcus was a very close student of the Bible, or else he'd know these:
"In the lips of him that hath understanding wisdom is found: but a rod is for the back of him that is void of understanding." - Proverbs 10:13
"But the tongue can no man tame; it is an unruly evil, full of deadly poison." - James 3:8
"Out of the same mouth proceedeth blessing and cursing. My brethren, these things ought not so to be." - James 3:10
Now for a bit of Biblical history:
Nehemiah, a talented administrator and trusted advisor to the king of Persia, worked as a cupbearer to both King Artaxerxes and to the Queen - a fact that means he was almost certainly a eunuch.
Unlike many Biblical personages, there is some evidence Nehemiah was a historical person who served as governor of Persian Judea under the king, and who helped rebuild the walls surrounding Jerusalem.
Eunuch is not an insult. Demarcus, whose tongue is a restless evil and full of deadly poison, intended it as one...much like he intended the words "faggot" and "ignorant dolt" as insults.
If this man believes his cheap insults are in any way a variation of speaking with pastoral authority,’ as opposed to just being the mean-spirited jabs they are, then his mind is a lost cause.