not because they disagree with him, but because it turned out his policies didn't work.
They wanted to lower taxes, engage in wars, eviscerate regulations and spend more on defence, and then they were surprised he left a collapsed economy and a deficit.
So what's the new plan? Um. Lower taxes, new wars, minimised regulations and defence spending.
http://www.nextnewdeal.net/rortybomb/romney-will-solve-crisis-exact-same-gop-plan-2008-2006-2004
"But the same exact playbook is there in 2006, as it was in 2004 and 2008, and as it is in 2012. Domestic oil production, school choice, trade agreements, cut spending and reduce taxes and regulations -- it's been the conservative answer to times of deep economic stress, times of economic recovery, times of economic worries, and times of economic panic. Which is another way of saying that the Republicans have no plan for how to actually deal with this specific crisis we face."
Wash, rinse, repeat.