>when people interact with someone from their social “outgroup,” they often come to view that outgroup in a more favorable light

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My brother is a Republican. While I lean conservative on many issues, I find today's Republicans to be dangerous and terrifying. When we have a private, rational discussion on specific policies, we agree on many points

When he's on a rant, he spews the most awful, irrational hate for all Democrats and love for Trump

The interaction with the outgroup needs to be a rational policy discussion, not an angry rant