What is this based on? This illustrates the problem. Your beliefs are based entirely on speculation rather than on scripture.
Beyond that, though, you do believe the Israelites will sin at some point during the thousand years. So, how can you say that they make an end of sin when Christ returns? That clearly would not be the case if they still sin after that. So, your understanding of how the making an end of sin prophesied in Daniel 9:24 is fulfilled is clearly flawed.
Nowhere does scripture teach that every individual in Israel will one day accept Christ. Why would that be? It seems that only special divine intervention on their behalf could accomplish that, but then why would God, who is not a respecter of persons, only do that for one nation and not the rest? That does not make sense and contradicts God's character. You should not believe in a doctrine that contradicts God's character.