Sometimes, it’s not actually about the thing.
"John Collins at Yale told me that no mainstream scholars accept the early dating."
John Collins? I think you put too much confidence in credentials, to the point that you disregard the data. John Collins is exactly the kind of person Yale would hire...not for his penetrating intellect and scholarship, but for his politics. https://www.thecollegefix.com/post/14724/ I am acquainted with authentic Bible scholars, and John Collins is not one.
I won't present my own formidable arguments now against the scholarly consensus, but you really should look into the merits of the arguments yourself. You've done thorough work to reveal that Ravi Zacharias has feet of clay, just like you and I. But that does not vindicate belief in the horse shit that is passing for science now, and it absolutely does not warrant dismissal of Bible prophecies. I hope your tenacity remains intact if you are in an active pursuit of the truth.
I recovered from Southern Baptist protocols, too. I pray you well.