Maybe because if any nominatable Democrat wins he will give the UN a veto over American national defence and pack the courts with still more elitist secularist zealots who will finish destroying the foundations of social order? Is that a reason? Or should we cut off our noses to spite our face, and let our grandchildren inherit the shame of millions more abortions and Dutch-style killing of the elderly, while living in one big terror-dominated Belfast from sea to shining sea? -- but by God we didn't dirty our hands voting for that SOB Bush!
Some people fear immigration and the national debt. I fear total social collapse under the pressures of global terrorism, leftist judicial tyranny, and Democrat's taxing the life out the country to support Social Security once the boomers are living off a workforce half their number. Some people fear the prospect of their grandchildren living in Mexifornia. I fear the prospect of mine living in Monrovia USA. I don't know how to convince someone who doesn't see the reality of that prospect. But I'm voting for Bush.
They and their ilk kept the California GOP wandering in the electoral wilderness for years.