Purrpurr,
There are also certain key features to Daniel besides how the Jews traditionally view the book that support the mainstream views, such as:
The first verse is a narrative device commonly employed in Semitic literature to tell the reader the stories are not meant to be read as historical. The opening verse states that Babylonian monarch Nebuchadnezzar laid siege to Jerusalem "in the third year of the reign of Jehoiakim, King of Judah." (1.1) However the siege of Jerusalem occurred atfer the death of Jehoiakim, a death which occurred likely after his own individual capture by the Babylonians prior to their invasion. It is common in the Hebrew Scriptures for authors to take poetic liberties (much like movie makers today) when merely using history as a generic setting.
The Book of Daniel pokes fun at Babylonian political and religious culture by satirically mocking the way the Chaldeans made formal listings of everything. The author employs this technique in the narrative section of the book when describing things the Babylonians were highly serious about and felt we all so important. The author does this in describing the astrologers, wise men, political figures and the musical calls to worship to the point that it gets ridiculous. Because Babylon is no more, the author can get away with it.--Daniel 3.2,3, 5, 7, 15, etc. as one set of examples.
The Book of Daniel describes a historical event that actually involved Nabonidus, father of Belshazzar, as happening to Nebuchadnezzar in chapter 4. The all-important tree dream used by Jehovah's Witnesses is nothing more than a narrative device aimed at countering the pride of the Seleucid dynasty of the period of the book's composition. By claiming that God did this to Nebuchadnezzar, once considered Babylon's greatest ruler, the author was implying it would happen to the proud officials of his day even more easily. History knows for sure that these events happened to Nabonidus who went to live in Teima during his "madness." The historical notion was strengthened by the discovery of the Prayer of Nabonidus among the Qumran scrolls.
The Book of Daniel contains no oracles to Israel or Judah. For a book to be considered a valid prophetic message inspired by God it must contain oracles or pronouncements from YHWH to his people. The phrase in most English Bibles in the Prophets is: "Thus sayeth the LORD." The phrase in Hebrew is actually, "Oracle of the LORD." The book of Daniel has no such phrase and none of its visions or "prophecies" are for Israel or Judah. They are all addressed to non-Jews and Gentile nations.
The book, nevertheless, has great value as it is one of the few links the Jews have in their Scriptures to God's redemption during the days leading to the rise of the Hasmoneans (Maccabees) and the rededication of the Temple (Hanukkah). Christians see in the reference to the composite Jewish nation (called "son of man" in Daniel 7.13, 14) a foreshadow predicting the coming of Christ, so it is not totally disconnected to the future.