There is absolutely nothing wrong with the current system. If they enforced current law, there would be a fence and deportations would be rapid and sure. They would be defending States from the invasion, deny anchor baby status. They would arrest people using stolen SSN# and jail then deport them.
But if you are naive enough to believe they will enforce new laws better than they do the old ones, then God help us all.
No I’m not naive enough to believe that. But you are wrong that there is nothing wrong with the current system. The current system includes the piece that none of it is enforced.