Comment by bluGill

Because anything one side says the other must automatically and reflexively oppose no matter what. The example here is Right hating on Left, but the Left as the same illogical hate against the right - though in different areas.

This has often been blamed on first past the post voting - if you want to win you have to team up which means your views on Abortion and Environment Policy have to align even though there is no reason to think the two should have anything to do with one another. Since there is no room for thinking each side is correct one one and wrong on the other you have to oppose anything the other does without wondering if maybe they are correct. Now remember that are thousands (millions?) of different issues, and many of them have a range of different answers, yet there can only be one unified position that you support...

I'm not convinced that the various alternatives are really better though. They all seem to have issues in the real world, and too often people will look at what they have an ignore the issues because they want to feel better.