If TV news has taught me anything it is that the number of people who vehemently (even violently) disagree with my (probably only moderately) progressive opinions is not small. My guess is most of us just tend to associate with people who have a similar spectrum of opinions and biases.
Yes, that's the point of the old "I don't know how Richard Nixon could have won. I don't know anybody who voted for him" quote ( https://en.wikipedia.org/wiki/Pauline_Kael#Alleged_Nixon_quo... ). It's hard to remember, but Nixon won a larger share of the vote in 1972 than any previous president, which left McGovern fans somewhat shellshocked.
The quote is often used a proof that Pauline Kael was clueless, but, IIRC, she began by saying "many of my liberal friends have told me ...," i.e., she wasn't truly perplexed by Nixon's victory. Instead, she was pointing out that there are downsides to being insular about politics.
The difference between you and the vast majority of the population is that you recognize there are dissenting viewpoints held by people you've never met.
