Really? When? Older people may remember when politics wasn't a major concern for people who were generally neighborly.
Fifty or seventy-five years ago, if your job was towing motorists, how likely were you to leave somebody by the side of the road because he or she voted for Roosevelt or Stevenson or Kennedy, rather than Dewey, Eisenhower or Nixon (or vice versa)? Wouldn't behavior that partisan have raised eyebrows and provoked disapproval back then?
As I remember there was even worse going on.