Believing the Bible and what it teaches is most important. Bush claims to do so. Yet, Bush has let himself be manipulated by Neocon elitists who are quite happy to co-opt Christian or any other belief which suits their own aims.
(Watch the documentary called "The Power of Nightmares" to find out how this ideology works).
So Bush has been the cause (on a smaller scale) of misery and chaos of the kind the Antichrist will bring on earth.
Who knows ? The seeds of instability which Bush has sown in the most strategically important region in the world may perhaps set the stage for the Antichrist.