With all due respect, there is no reason other than dispensational presuppositions for inserting a gap of (to this point) several thousands of years in between the 69th and 70th weeks.
It’s called the Church Age, prophesied twice by Christ. Once in the upper room discourse, and another time prior to His Ascension.
Romans 11 alone, dispells your theory...The church for the Gentiles was revealed thru the apostle Paul...This period is the time of the Gentiles...The church age...
When the times of the Gentiles is fulfilled, God reveals he will go back to his chosen, the Jews...And then, Christ will physically reign on earth as the King...
The fact that you don't believe this only shows that you don't believe what God said...Lotsa educated folks don't believe what God said...