Just for the record, I believe it was Karl ( not Groucho) Marx rather than Mao who originated that phrase, though perhaps Mao might have re-iterated.
I want to go on the record as well as saying that your responses and arguments are reasonable rebuttals in what we could pass off as a debate. Some of what you present I could subscribe to as well, such as the dossier model for the stories of Daniel. That it is there in the Bible - there are a number of reasons. But its interpretation and origins I see as open to question. While some of my arguments are traditional from earlier studies, I have never seen anyone in the Biblical studies community consider the evidence of Greek historical documents in the way I have presented it. Nor do I elicit much response when I do.
But ythere is still at least one more item I should present regarding Nabonidus. It's from the Qumrun. (4Q4Q2):
Deciphered or translated on Livius from the Aramaic it goes thus:
Words of the prayer, said by Nabonidus, king of Babylonia, [the great] king, [when afflicted] with an ulcer on command of the most high God in Tem�:
[ 'I, Nabonidus,] was afflicted [with an evil ulcer] for seven years, and far from [men] I [was driven, until I prayed to the most high God.] And an exorcist pardoned my sins. He was a Jew from [among the children of the exile of Judah, and said:] "Recount this in writing to glorify and exalt the name of [the most high God." Then I wrote this:] "When I was afflicted for seven years [by the most high God] with an evil ulcer during my stay at Tem�, I prayed [to] the gods of silver and gold, [bronze and iron,] wood, stone and lime, because [I thought and considered] them gods [..."']
[the end is missing]
It is noted at the site that the gods of silver and gold... wood also appears in the Daniel chapter 5:23-24
Daniel speaks to Belshazzar: "You have praise gods of gold and silver, of bronze and iron, of wood and stone, which neither hear you or understand you, but you have given no glory to the God of in whose hands are your breath and all your fortunes. That is why he sent the hand that has written these words."
As you say, Belshazzar awards Daniel position number three after hearing these words.
But the facts remain that Belshazzar was not the son of Nebuchadnazzar and the kingdom did not suddenly fall into the hands of Darius the Mede - but to Cyrus after a campaign which involved both Nabonidus and Belshazzar. If the city fell over night, there was no need for reading wall handwriting to predict the future - nor to have a feast.
The Nabonidus prayer indicates that someone else in Qumrun was aware of Nabonidus and had an interpretation of his time in the desert. Who originated the emboldened phrase above is arguable, but the anonymous writer of the prayer appears to me closer to the historical roots of the story.