We don't need to secure the borders. Hell, no. Those poor immigrants coming here to make a better life for themselves is all that's important and by golly we can't, if we're to remain good and Godly people, do one single thing to inhibit their ability to enter at will. Why criminalize the foreigner with whimsical laws for crossing imaginary lines? Aside from the fact that only an idiot would think an unregulated influx of just anyone, even the "hard working people trying to save their families from imminent starvation", is a good idea, here's why.
Oh hell, I'm sure it's just right-wing fear mongering. Nothing to it at all. No, no, it's just racism under the guise of "national security". Yeah, like any sovereign nation needs to worry about something like THAT! Those wing nuts! They're so goofy!!