Why do we understand the "prince of Persia" in Daniel 10:13 to be a wicked angel/Demon?

[Anna]

Why do we understand the "prince of Persia" in Daniel 10:13 to be a wicked angel/Demon when it seems that the messenger is talking about a succession of actual kings, and if the demon is called a "prince" of Persia,  who then is the "prince" of Greece in 10:20?

[Evacuated]

On 10/11/2017 at 2:25 AM, Anna said:

Why do we understand the "prince of Persia" in Daniel 10:13 to be a wicked angel/Demon

Well one reason would be the scrripture at Dan. 10:20-21 (You quoted partially.) The angel speaking here mentions the princes of Persia and Greece in the same breath as Michael "your prince". (the prince mentioned at Dan. 12:1). The context itself indicates to me that these "princes" are all spirit creatures and the angel speaking these words provides an insight on what is going on "behind the scenes" as it were.  Isn't that reasonable? 

[Melinda Mills]

Who would want to resist and hold up an angel who was sent BY GOD on an urgent mission to an old man in need but a desperately wicked and strong spirit person?

[Melinda Mills]

*** dp chap. 12 pp. 204-205 Strengthened by a Messenger From God ***
[Box on page 204, 205]
Angelic Guardians or Demonic Rulers?
  WE CAN learn much from what the book of Daniel says about the angels. It tells us about the role they play in carrying out Jehovah’s word and the effort they put forth to fulfill their assignments.
  God’s angel said that on his way to speak to Daniel, he was hindered by “the prince of the royal realm of Persia.” After contending with him for 21 days, the angelic messenger was able to proceed only with the help of “Michael, one of the foremost princes.” The angel also said that he would again have to fight that enemy and possibly “the prince of Greece.” (Daniel 10:13, 20) No easy task, even for an angel! Who, though, were these princes of Persia and Greece?
  First of all, we note that Michael was called “one of the foremost princes” and “the prince of you people.” Later, Michael was referred to as “the great prince who is standing in behalf of the sons of [Daniel’s] people.” (Daniel 10:21; 12:1) This points to Michael as the angel assigned by Jehovah to lead the Israelites through the wilderness.—Exodus 23:20-23; 32:34; 33:2.
  Lending support to this conclusion is the disciple Jude’s statement that “Michael the archangel had a difference with the Devil and was disputing about Moses’ body.” (Jude 9) Michael’s position, power, and authority made him truly “the archangel,” meaning “the chief angel,” or “the principal angel.” Most fittingly, this lofty position can be applied to none other than Jesus Christ, the Son of God, before and after his life on earth.—1 Thessalonians 4:16; Revelation 12:7-9.
  Does this mean that Jehovah also appointed angels over such nations as Persia and Greece to guide them in their affairs? Well, Jesus Christ, the Son of God, openly stated: “The ruler of the world . . . has no hold on me.” Jesus also said: “My kingdom is no part of this world . . . my kingdom is not from this source.” (John 14:30; 18:36) The apostle John declared that “the whole world is lying in the power of the wicked one.” (1 John 5:19) It is clear that the nations of the world never were and are not now under the guidance or rulership of God or Christ. While Jehovah permits “the superior authorities” to exist and maintain control of earthly governmental affairs, he does not appoint his angels over them. (Romans 13:1-7) Any “princes” or “rulers” over them could be placed there only by “the ruler of the world,” Satan the Devil. They would have to be demonic rulers rather than angelic guardians. There are, then, invisible demonic forces, or “princes,” behind the visible rulers, and national conflicts involve more than mere humans.

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Also we are certain the world powers get their power from Satan the ruler of the demons. Read Rev 13:1,2

(Revelation 13:1, 2) And it stood still on the sand of the sea. And I saw a wild beast ascending out of the sea, with ten horns and seven heads, and on its horns ten diadems, but on its heads blasphemous names. 2 Now the wild beast that I saw was like a leopard, but its feet were like those of a bear, and its mouth was like a lion’s mouth. And the dragon gave to the beast its power and its throne and great authority.

Light and darkness do not cooperate together.
 

Italics, mine.