Just culling a coupla canards outta the middle:
Except we don't. That's the strawman myth upon which is built the "wall". Which, in turn, is as transparent as glass for anyone who cares to inspect the reality. As, f'rinstance,
National Review did.
It's well known that most illegal immigration comes from overstaying visas. The "wall" is a myth that can't be built, built on a myth of teeming hordes of terrorists that don't exist, to sell snake oil to the gullible.
As the Rump "University" playbook candidly put it, "you don't sell solutions --- you sell feelings". Which is exactly what Rump the con artist did. But to do that he needed complicity from the Gullibles. And there you are --- batter up.
An imaginary "wall" is not a "border". And the border in question is more secure than ever. Prove it isn't. Prove that, because that's the bullshit your whole thread hangs on.