I know you believe that or wish to contend that both sides are equally responsible but that is never actually true. Frankly, until this President I see few differences between the parties on foreign policy. Different politicians might have different perspectives, but it isn't party specific.
On domestic policy it pretty much comes down to social engineering. How do we deal with the poor and the middle class?
The GOP position pretty much takes its inspiration from Ayn Rand, Adam Smith and Gordon Gekko. The view is that selfishness is inevitably good for everyone. By assisting the poor we are being counterproductive. That we are taking away their incentive to do for themselves. The best remedy for poverty is for the government to get out of the way and resist the attempt to help.
Democrats OTOH, see the inherent unfairness of the economic system and see that the every man for himself leads to a good quality of life for only a select few. That government involvement is not only good but necessary. If there is an inspiration for Democrats, it would have to be John Rawls and his Original Position and the veil of ignorance.
These two positions are so diametrically opposed that finding common ground is pretty much an impossibility.