“Buy them out via eminent domain and be done with it. It’s important for the safety and security of the nation. Sorry, but they need to see past the end of their nose and look at the larger picture.”
If you want to start a war with the very citizens who helped get Trump into office then proceed with your idea and give Mexico the river.
Closing off border access is not “giving” the Rio Grande to Mexico. Those ranchers who voted for Trump knew he was adamant about building the wall. Patriots have sacrificed their wealth for this country in the past. They wouldn’t even be doing that, they’d be paid fair value plus cost of relocation. But, hey, shoot ‘em up, cowboy, dern tootin’ they ain’t takin’ mah layund. Start a border skirmish, see how far that gets you.