Quite nauticant. Life must be so boring for these people who banish from their lives and 100% condemn every person who says something they don't agree with. It's essentially just making yourself a fully sealed echo chamber on every issue.
Also people can change their minds on things, given evidence and discussion, or they can not change their minds but accept that others disagree, and find ways forward. This comes about by people who don't always agree, having debates on things. 