Look at TV. Everything there is one group fighting some other group. Argument becomes entertainment. Violence is entertainment. Insulting moral values is entertainment. Law vs criminals is entertainment. Survivor shows based on trashing someone each week. Everything is increasingly polarized now because America has corrupted it's social mean, twisted it's legal mean, and belittled it's religious mean.
It's like here at times, not honest discussion but one says up so the other says down, one says left so the other says right, just so long as they can be in disagreement even where there is no need to be, nor for it to continue, people of deliberately contrary attitude not necessarily based on any principle, just who they are replying to. We know who they are. They must have the last word so bad it becomes a joke. Playing the game just to expose their ridiculousness risks looking just like them.
So, why blame the politicians when they are only reflecting our society as it now exists? I say blame them because they are supposed to be better, act better, lead toward better, if they are holding such offices. Even if we had 10% turn over of the Senate and the House every 2 years, it would take 20 years to have a completely new group in there, probably longer. I don't believe in term limits though, since people should be able to elect whomever they want to represent them. I think those who in past have managed to retain their seats due to seniority and committee asignments would lose those seats quicker if we insisted the seniority rules were tossed out as unconstitutional and each election everyone was on equal footing when they entered the Senate or House. We obviously can't have all inexperienced people in Washington, but we need to insist the rules which encourage states to reelect some to office based mainly on the power they've garnered while there should be changed.