I’m convinced the entire point of corporate social media is to create tribes and make everyone hate each other.
Discussion
Divide and conquer… the oldest trick in the game
Additionally, a lot of people who are in these places are exactly like this picture 
Very well put by Jimmy Song
I don't think it requires a conspiracy. The point is to keep people looking at ads. The algorithm objectively determines that people spend more time on the platform when it surfaces controversial content. People's natural dopamine response to tribal threat drive this.