This is rough, mind you, and likely will not be all inclusive, but in a nutshell, IMHO:
Some of these diehard Bushbots have been waiting for the return of this brand of conservatism (Not to be confused with traditional conservatism, of course). I think many are 'prolifers' who were waiting for 'their guy' to get in there and screw with choice issues. They've put up with so much from Bush & Co. because it's all been as a means to their end -- the hopes of turning over Roe v Wade. They knew the time was ripe for this, given the upcoming chances for SCOTUS nominations, etc.
Many of these prolifers are also end time believers, who have been brainwashed to support Bush & Co. for all the varied reasons that are associated with their self-fulfilling biblical prophesy. This group might also include dominionists and reconstructionists, who believe that a Christian-based country/government will rid the evil from our society (among other things, such as creating a Christian society for Christ's return, etc.).
Some are still pissed at the Vietnam antiwar movement. Here's a quote from Rise of the Vulcans, a book that often discusses the history of persons in this administration in relation to their views on foreign policy, military might, etc. (ie., detente v strong military stance, build up and such):
In both symbolic and tangible ways, Ronald Reagan moved quickly to restore morale in the armed forces, attempting to overcome the legacy of Vietnam.
The previous year a retired army sergeant named Roy Benavidez had been belatedly awarded a Congressional Medal of Honor for his bravery in saving eight members of the Special Forces in Vietnam. ... During his final months in office, President Carter had been asked by the Pentagon to award Benavidez his medal, but he delayed and finally left office without doing so. On February 24, 1981, Reagan presided over an elaborate White House ceremony for Benavidez, read the Medal of Honor citation himself and added some pointed words whose meaning could not be missed. "It is time to show our pride" for those who fought in Vietnam, reagan declared. "...They came home without a victory not because they were defeated, but because they were denied a chance to win." ... The Army officer who quietly orchestrated this even was Brigadier General Colin Powell. At the beginning of the new administration Powell was serving as a military aide to his third consecutive deputy secretary of defense, Frank Carlucci. President Carter's failure to hold a ceremony for Benavidez "epitomized fir ne ab insensitivity to the military during tis time," Powell later wrote. p. 117
Lastly, you have folks who are more in the camp of a strict authoritarian view of the world as opposed to an authoritative approach. These definitions were applied by George Lakoff in two of his books that discuss the differences between liberals and conservatives (MORAL POLITICS: HOW LIBERALS AND CONSERVATIVES THINK and DON’T THINK OF AN ELEPHANT! WHAT EVERY AMERICAN SHOULD KNOW ABOUT VALUES AND THE FRAMING WARS.) Here's an excerpt from a discussion with Lakoff:
Back up for a second and explain what you mean by the strict father and nurturant parent frameworks.
Well, the progressive worldview is modeled on a nurturant parent family (authoritative). Briefly, it assumes that the world is basically good and can be made better and that one must work toward that. Children are born good; parents can make them better. Nurturing involves empathy, and the responsibility to take care of oneself and others for whom we are responsible. On a larger scale, specific policies follow, such as governmental protection in form of a social safety net and government regulation, universal education (to ensure competence, fairness), civil liberties and equal treatment (fairness and freedom), accountability (derived from trust), public service (from responsibility), open government (from open communication), and the promotion of an economy that benefits all and functions to promote these values, which are traditional progressive values in American politics.
The conservative worldview, (authoritarian --Emit) the strict father model, assumes that the world is dangerous and difficult and that children are born bad and must be made good. The strict father is the moral authority who supports and defends the family, tells his wife what to do, and teaches his kids right from wrong. The only way to do that is through painful discipline — physical punishment that by adulthood will become internal discipline. The good people are the disciplined people. Once grown, the self-reliant, disciplined children are on their own. Those children who remain dependent (who were spoiled, overly willful, or recalcitrant) should be forced to undergo further discipline or be cut free with no support to face the discipline of the outside world.
So, project this onto the nation and you see that to the right wing, the good citizens are the disciplined ones — those who have already become wealthy or at least self-reliant — and those who are on the way. Social programs, meanwhile, "spoil" people by giving them things they haven't earned and keeping them dependent. The government is there only to protect the nation, maintain order, administer justice (punishment), and to provide for the promotion and orderly conduct of business. In this way, disciplined people become self-reliant. Wealth is a measure of discipline. Taxes beyond the minimum needed for such government take away from the good, disciplined people rewards that they have earned and spend it on those who have not earned it.
edited to add link: Lakoff:
http://72.14.207.104/search?q=cache:_Gz9p_mFF1oJ:www.berkeley.edu/news/media/releases/2003/10/27_lakoff.shtml+authoritarian+authoritative+Lakoff+politics&hl=en&gl=us&ct=clnk&cd=2