You are mislead. 100 to 200 years before His birth, the Zadok priests were giving prophecies of the exact yeqar Jesus/Messiah would be vorn, the year He would die, etc. There is much more, if you are truly interested in what is being revealed in these last days.
If I am misled, kindly point me to the text of the DSS to which you are referring about the rapture of Christian believers. The DSS texts are widely available online and you should easily be able to provide them. Thanks in advance.