Some of the charges against Hagee are far more serious than what I'll deal with here at this time. But if Hagee's followers can be shown that these charges are true, then they will disown him. The goal of discussion should follow from that, but instead, criticism of Hagee is used to prove a whole range of antisemitic stereotypes to discredit "bad Jews" and promote "good Jews."
There is one point where it seems particularly clear to me that Evangelicals are wrongly maligned. Hagee writes:
Like all people of faith, we Christians firmly believe that our religion is true. But we also believe in religious freedom and have enormous respect for the Jewish faith. The first rule adopted by Christians United for Israel was that there would be no proselytizing at our events. CUFI exists only to honor and support the Jewish people, never to convert them.I don't think it's controversial to say Hagee is, here, both defending himself from real attacks and addressing real concerns among Jews. Neither do I think it's controversial to say that there is work to be done among Christians to more fully realize this goal of refusing to proselytize. I think especially of the disparity between Orrin Hatch's Hannukah song (and that he wears a mezzuzah-inspired necklace) and the continuing Mormon practice (Hatch is Mormon) of baptizing Jews by proxy without consent. Christians who claim to support Jews in the way Hagee and Hatch do could, for instance, lobby the Church of LDS to stop that practice. But I do believe the desire to be sensitive to Jewish concerns is sincere.
My view on this is partly shaped by having had a roommate in college who was a member of the InterVarsity Christian Fellowship. He appeared in every way typical of the conservative Evangelical movement. [UPDATE: At least, the younger part of the movement. In comments, Rebecca mentions Falwell and Robertson. I don't think this post would be true if it were about them.] I had a lot of disagreements with him, including that he thought I was going to Hell. But the reason wasn't that I wouldn't convert to Christianity. His view, the dominant view in conservative Evangelical circles, is that Christ came to broaden the message of G-d, but that His covenant with Jews remained as valid today as it had ever been. In other words, I was going to Hell because I wasn't a very good Jew. If I'd kept kosher and observed the Sabbath, believing in Jesus was optional. That doesn't mean he wouldn't have preferred me to be an "Evangelical Jew" but it wouldn't keep me from Heaven if I didn't believe in Jesus. This replaces the incredibly problematic and historically dominant supercessionist view, that Christianity had replaced Judaism and that the Covenant with the Jewish people had been broken. There is still Supercessionism around, but mainstream Evangelicals have used "supercessionist" as a charge with which to discredit. If Hagee can indeed be shown to be a supercessionist, he will be discredited among his own followers.