Does Deutero-Isaiah Disprove the Book of Mormon?

Often the biggest attacks on the Book of Mormon end up becoming some of ts most amazing evidences. Bible scholars hypothesize that Isaiah may have been written by two or even more authors. According to scholars, Isaiah 1-39 was written by or recorded from the original Isaiah. but 40-55, or 66 was written after the Babylonian captivity.  This theory mainly stems from the mention of King Cyrus of Persia as the future king who would return the people of Israel from captivity.  Scholars think it way too far fetched to believe any prophet could predict the future in such a specific manner.  There are several textual differences in style as well.  

So, if true, why would the second half of  Isaiah being written after the Babylonian captovity completely disprove the Book of Mormon?  This is because if the Book of Mormon quotes the second half of Isaiah yet Lehi left Jerusalem before the  Babylonian captivity and before deutero-Isaiah would have been written. 

Haha! some might exclaim.  But, not so fast.  There may be a brilliant explanation to all this. J. Eaton wrote a book entitled "Festal drama in Deutero-Isaiah" pointing out that the second part of Isaiah was a Festal drama or theater play and that explains the literary differences.  

What is a Festal drama? Back in Bible times people didn't have access to scriptures let alone read.  They were lucky if their local city synagogue had a full set. Most people's familiarity with scripture depended on memorization. Accordingly, it was much more common for people to have large portions of scripture memorized. To help in this,  certain portions of scripture were read at certain points of the year and during holidays such as Exodus story at Passover, the Book of Ester during Purim, and the Nativity story during Christmas.  Many believe the Book of Mark (the earliest gospel) was also a drama.  Eaton believes, the second part of Isaiah could be a similar Festal drama presented at the Jewish New Years involving the coronation of the King of Israel. 

So, how does this realization, support the authenticity of the Book of Mormon?  Because, duetero-Isaiah could have been known during Lehi's time orally transmitted and written down sometime later.  Jacob told his people that he would recount unto them the words Isaiah "spake."  

Jacob 6:5 "And now, the words which I shall read are they which Isaiah spake concerning all the house of Israel; wherefore, they may be likened unto you, for ye are of the house of Israel. And there are many things which have been spoken by Isaiah which may be likened unto you, because ye are of the house of Israel"

Additionally, Dave Butler. Mike Day on "the Stick of Joseph" podcast suggested Abinadi, the rightful hier to the thrown rehearsed the Isaiah, suffering servant, coronation drama to King Noah to declare Christ's and Abinadi's rightful claim to the throne and to denounce King Noah's hypocrisy and corruption.  But, in consequense, wicked King Noah had Abinadi ritually burned alive as part of a sick and brutal pagan ceremony as pointed out by Jerry Grover. (Mosiah 19:24)

This ceremony involved sorcery (pharmakia). or taking mind altering drugs, torture, adenochrome,  demon possession, the performance of superhuman acts such as levitation such that King Noah (only a puppet of the elite) was fooled into believing he was a god. 

Sadly, these pagan ceremonies which likely originated with the Jaredites were continued by the Maya who later enslaved the Mississippians (Lamanite descendants) for generations afterwords' subjecting them to these same grotesque satanic rituals which is in fulfillment of Abinadi's prophesy. 

[https://www.yucatanliving.com/culture/the-maya-and-the-mississippi]