Why I am not a Christian Zionist

I believe that the people who descended from Jacob (Israel) were a priestly people. The Cohen (descendants of Aaron (Levites) were to offer sacrifices at the altar. However that role was fulfilled with the Supreme Sacrifice (the crucifixion of JESUS the CHRIST) and hence the need for a temporary priesthood (Israel) has been completely replaced by the eternal Priesthood of Jesus. While many Christians get confused on this matter and either launch into 'death to the Jews' or "Let us bring Israel back from the ashes". Thus some Christians become Christian Zionists and I have heard that some Christians say that unless Israel is brought back their faith is meaningless.