Let them build it. It was Trumps campaign promise after all. Just make it clear to them there's no way they'll get Mexico to spend a single centimo on it. Maybe then the gravity of their stupidity would finally sink in. Besides, it's not like the wall would stop smugglers - they'd just build tunnels or use drones. And people can still get in through airports and then just "overstay".
Also, Trump once mention the Great Wall in China. Funny, that never really stopped invaders from coming in.
To the OP, you're talking like a wall doesn't already exist. A wall along the Mexico border already exists for hundreds of miles. Trumps proposal tries to complete the wall that Bush jr. started. And controversy from the public comes from how Trump communicated his proposal and "the why" he used to claim that Mexicans are providing negative impact on society.
I think this is a colossal waste of money. I'm not for illegal immigration but it's clear that illegal immigrants aren't stealing the jobs that voters are concerned about. They're filling the jobs that people don't want to do. I wonder how many former factory workers that voted for Trump will be willing to wash dishes and clean hotel rooms if/when illegal immigrants are forced out?
The wall won't prevent terrorism either.
Exactly. How many Americans want to give "perineal care"? How many of them would want to work picking apples? None? Who would do those? No one but immigrants. Oh, those fcukin countries like India and Philippines are stealing jobs through outsourcing? Well, how many Americans would like to sit on their ass for 7 hours a day, talking to obnoxious customers? I doubt American agents would be able to handle an irate American for 5 minutes without saying "fcuk, I'm out of here!".