Well, I'm glad you're finally noticing this. What you're seeing is the natural byproduct of propaganda delivery at scale. If you'd spent much time with people who have less mental defenses against propaganda, you'd have seen this pattern happening many years ago. If your parents had such weak defenses you'd have seen this pattern even earlier with partisan cable news. Since my parents were brain-melted by the weak tea of cable news, I could never bring myself to work directly on social media