Send him this letter at the link above:
Rev. John Hagee has made despicable, hateful remarks about gays, Muslims and the Catholic Church and said that Hitler was appointed by God to “hunt” the Jews. Presidential candidate John McCain recently renounced him, but you are scheduled to keynote his July conference.
I urge you to cancel your appearance at the Christians United for Israel summit. You must not help legitimize John Hagee, a dangerous demagogue.