Is Anyone Responsible for Anything?

I recently read some lefty blog or news source saying that the Republican party is using the immigration issue to put a wedge between Democratic leaders and Democratic voters. This has got to be some variant of new speak. The voters are against encouraging or supporting illegal immigration and Democrats in congress don't seem to care about enforcing our immigration laws or protecting our borders. How is that the fault of the Republicans? I used to think that the lefties had some complex formula for finding who is responsible for anything. It is more difficult to understand than string theory but it is there somewhere. Something along the lines of: if you and the last three generations of your family are 50.00001% descended from certain approved minorities (chosen every four years by the Democrat superdelagates) then the full weight of dead white men and Republicans have somehow deprived you of any power of choice and have raped you in every possible way. I have come to believe it is really not so complex. I think it is as simple as, 'if it is a good thing the Democrats caused it and if it is a bad thing the Republicans caused it (and we'll create some semi-intellectual blather to explain it especially since all the leftie college professors quit teaching years ago and have plenty of time to spend creating b. s. ex nihilo).'