You echo the apostasy of Hagee. The word Christian comes from Christ, which is the Greek translation for Messiah. So even if Hagee were correct, he could not be called a Christian. The Jewish people expected their Messiah in the time of Jesus. At first, they thought that John the Baptist might be the One, but he pointed them to toward Jesus:
... Now it came to pass, when all the people were baptized, that Jesus also being baptized and praying, heaven was opened; And the Holy Ghost descended in a bodily shape, as a dove upon him; and a voice came from heaven: Thou art my beloved Son; in thee I am well pleased. (Luke 3:15-17,21-22)
Do you think the Jews who followed the Apostles were mistaken and the ones who followed the Pharisees were correct? Hagee harms the Jews by giving them reason not to accept Jesus until His second coming, when He returns at the End as Judge.
Rom 11:7 What then? Israel hath not obtained that which he seeketh for; but the election hath obtained it, and the rest were blinded
Rom 11:8 (According as it is written, God hath given them the spirit of slumber, eyes that they should not see, and ears that they should not hear;) unto this day.
Rom 11:9 And David saith, Let their table be made a snare, and a trap, and a stumblingblock, and a recompence unto them:
Rom 11:10 Let their eyes be darkened, that they may not see, and bow down their back alway.
As we can see, Jesus says you are wrong...Some Jews may get saved along the way but God has blinded the minds of the Jews until the times of the Gentiles has been fulfilled...
What John Hagee is doing is making sure you guys don't steal the promise given by God to Israel...And of course, you can't steel the promise...But you can mess a lot of folks up with your false theology along the way...