Don't have to. In my town, meth-head Trump supporters just bust your door down and steal your PlayStation while you're playing it. Apparently walls don't work on them, either.
Or if you want you guys build the wall before we deport you and shove you across the border. Either way is fine. But I know right wingers have a penchant for being ditch diggers, so... Might as well use them for the only thing they're good at.