When driving down a country road, you wave to any approaching driver, regadless of race, creed, religion, pick up truck model, or tractor choice (John Deere green, International Harvester red).
This is the etiquette.
Yesterday, I waved to Ford, Chevy, Nissan, and Toyota pickup trucks.
It was a banner day, since I also waved to both a John Deere and an International Harvester.
You thought the rivalry between the Bloods and the Crips was bad, you don't want to be around when these old farm boyz start talking cr*p about each others choice in tractors, lawm mowers, etc.