Yes, that's one way to do it. Or one could just change their perspective to see the other people as people, focusing on the similarities rather than the differe

Yes, that's one way to do it. Or one could just change their perspective to see the other people as people, focusing on the similarities rather than the differences. I'd argue that if one has so much hatred to try to physically get rid of the "other team" instead of trying to expand one's own definition of team, then that person is likely to subdivide people into teams once those people are gone. That's why I think uniting over a common enemy doesn't work, because once the enemy is gone, people just carry their anger and fear of others into seeing new enemies and splitting off into more and more teams. At least what I've found for myself is that it is much cheaper, quicker, and longer-lasting, to just redefine the boundaries of my team instead of strictly enforcing those boundaries through violence.