If democratic politics want to avoid polarization, voters should be rational, and supporters of different parties should understand each other. Only in this way will those candidates tend to adopt a compromise route. But what I see now is that Biden's supporters think Trump's supporters are fools, and Trump's supporters think Biden's supporters are fools. This extreme opposition has driven American politics crazy. Trump has many supporters, and their demands are not totally unreasonable.Why can't they understand each other?