I read your other comments and you seem informed and aware of a lot, I just don't see how you can reflect on such and decide it isn't ultimately driven by capitalism?
All of the "othering" you've witnessed and are (I think accurately) describing - that human tendency toward incoherent tribalistic behaviors and worldviews - that's baked into us, no disagreement there. But it's the capitalists who leverage it so successfully against us all and have made it the force that it is, here and today.
Like yeah the phenomena is real pretty much as you're describing, and it results from, is intentionally amplified by (doesn't just incidentally feed into) the way we are choosing to run our society. Capitalism + basic human nature = what we're all watching.
Not being a jerk. How does capitalism get off the hook as a primary cause here?