Illegal immigrants live tax free. In a non socialist society. For the US system which is nearly 20 trillion in debt, this is an issue due to significant amounts of money being slowed down or just out of the picture, as some of it will be sent out of the country by illegal means.
If the United States falls, so will your economy Ed. Because the US is the central for world trade and the banking systems that have been established around the globe. Maybe by now Rothschild has Libya too, since they were the only nation in the world to have their own banking system.
As for the US, I'd assume most illegal immigrants don't rob or kill people as most people in general refrain from doing that, while some of them do because they won't make enough flying under the radar in a world where open jobs have become scarce.
The truth is ugly. Your Outlook Ed is that of social justice, which kills democracy. It's hypocrisy at its finest coming from you, since you're a proven activist to maintain a democratic system in these very pages. You're free to say whatever. I'll then show you how ignorant you are, and if shit goes tits up for our species on planet Earth, just remember how you were a cheerleader for Hillary cause Trump has you trying to look good for people who need sugar coated realities, while Trump was the one trying to establish policies that strive to prevent the inevitable world depression.
This is not anti immigration Ed. When you stop being a cuck for the left, you'll recognize another aspect of your ignorance.