A Few months ago the most famous Anti-Missionary on radio came to me and said my Daniel 9 analysis was "circular logic" do you think that he would have said the same thing to the Bat Kol and Rabbis  in the Talmud as well?  Cause Megillah 3a says the Ketuvim is where the date of Messiah is foretold.  

Were the Rabbi's counting Jubilee cycles, to only site when the destruction of the Temple occurred?  Or is there something deeper they are looking for in which they did not want to discuss openly?  Could they have been trying to find the exact year because the prophet Daniel spoke about the Messiah coming before the destruction of the 2nd Temple?  Were they secretly trying to find out when Yeshua was born?  Is that why they sourced Daniel showing the year in which Messiah would be born?  You decide for yourself.