"The Republicans have been working very hard and for decades on this polarization."  Decades?   Not at all.  A decade, maybe.  The progressive movement began laying its plans at the turn of the last century.  Republicans are just now catching up.  The list you've provided is not a coordinated effort like the progressive movement is.  Progressives are the ones with alternative sets of facts.  As for the repeal of the Fairness Doctrine, all it did was slightly balance what was coming from the dominant, liberal leaning, mass media.  Rush and others began offering a conservative view point in 1988.  But it took until about ten years ago before enough people became aware of what the progressive agenda was.  The divide is between those who want to defeat the progressive agenda and those who want it to go forward.