I’ve been to all 50 states, and traveled this whole country, and 90 percent of the people are good folks. The rest of them take after the other side of the family.

In this line, Foxworthy uses a familiar, folksy setup—praising “90 percent” of Americans as decent—then pivots to a punchline that reframes the remaining 10 percent as relatives from “the other side of the family.” The joke depends on two ideas: first, that most people are fundamentally good regardless of region; second, that every family has an infamous branch, making “bad” people feel like an embarrassing but recognizable kinship problem rather than a national crisis. The humor softens social commentary: it affirms broad goodwill while acknowledging everyday aggravations, using family language to make a sweeping generalization feel intimate and non-hostile.