Bill Clinton says that people hunker down in like-minded communities. Do you agree with that? Its polarizing

Clinton said that people are hunkering down in communities because they are like minded which is polarizing to the nation. I don't agree with that at all. I never talk politics with my neighbors and seldom with my co-workers. He says that high percentages of people from the same community vote alike. Doesn't that have more to do with the confidence in the candidate rather than any kind of polarization? There are only two presidential candidates.