Concerning the anti-christ, we know from Sacred Scripture that anyone who dissolves Christ is of anti-christ. That would include anyone who dissolves any single one of Our Lord's teachings. If you want to know who is of anti-christ, look around and see who is dissolving Christ's teachings regarding modesty and chastity, who is not upholding his teachings on the sacramental nature of marriage, or his teachings against murder. Therein you will find anti-christ.
Regarding President Bush, who claims to be a Christian, Christianity teaches the doctine of just war. According to this doctrine, since innocent civilians were murdered in the 9/11 attack, Bush had a duty to do all he could to protect other innocent lives. Whether his response was based on truth, error, or lies is something that has yet to be ascertained. Wars must come, says Our Lord, who revealed to St. Anthony Mary Claret the reason why He allows wars - as a punishment for sin.
The real tragedy of Iraq is that Christ's command to make disciples of all nations and baptize them in the name of the Father, and of the Son, and of the Holy Ghost, has been rejected by supposed Christians who spend more time figuring out ways to dissolve this particular teaching of Our Lord than to faithfully fulfill it. They deprive most of the world, which God so loved and into which He sent His only begotten Son in order to establish His Kingdom of Truth and Holiness and Charity, of this very Kingdom on Earth.