If your first premise is wrong, then that explains why everything else you post after that is wrong.
The wall is only the most important part of the Trump agenda for people like Ann Coulter who value zany theatrics over substance. You could build a wall 1,000 feet high along the entire border, and we'd still have a very serious problem with illegal immigration.
When Trump said “wall” that is when anyone with a brain knew he was going to win. It’s about the wall. All of you Republicans are so stupid. For a mere $20 billion, the cost of a complete southern wall, you guys could secure a Republican majority for ever. But you guys are stupid as hell.