Earlier quoted context omitted.
While you may be right that future generations will condemn us for them, none of those things are remotely controversial enough. You can say any of them in almost any setting and people will mostly yawn. Many people think prisons should be banished, or at least severely limited (especially US prisons); there are plenty of popular vegetarians out there; assisted suicided is just your average polarizing subject. This i…
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.
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.