The atmosphere is so heated, and the statements are getting more and more extreme. Let’s just assume Harris wins the election. After a campaign like this, how could you ever have a normal relationship with your pro-Trump neighbor/father-in-law/Uncle/Barber or what ever again?
You can trace it back as least as far as Barry Goldwater and the rise of right-wing “think-tanks” in the 1960s which came as a backlash to the civil rights movement and the perceived dominance of left-wing politics in government. Which led to Nixon’s “Southern Strategy”, right-wing talk radio, Fox News, and the ongoing brainwashing of much of rural America in particular.