kramer, it's a different situation. Even if it weren't, though, uncontrolled immigration can't continue. My wife and I rescue animals. We currently take care of about 50, and we're at our limit; we just can't take in anymore. Even if the current immigrant situation were the same as it was with the settlers who built this nation, it wouldn't change the fact that there are limits as to what a system can support.
I used to live in a state where, a few years ago, anybody could be a general contractor. All one had to do was get a building permit from his county for a house, build it or have it built by subcontractors, and sell it. The problem is that way too many people started building houses to sell. The market was flooded with lower quality houses. The state finally changed the situation; one now has to have a state-issued general contractor's license with liability insurance and a worker's comp policy.. At first, maybe it didn't matter so much; houses were needed; but, then it got out of hand.
Similarly, at first, the field was wide open for settlers to come here and build a nation, but the situation is not like that now. I could go on and on about how wrong what you said is. Take, for example, some new gym or athletic club. At first, it might advertise and cry out for members, but, then it might reach a point where it has to turn people away or put them on a waiting list because it has a limit as to how many it can handle.
You do realize that the situation is not the same now as it was with the settlers who built this nation or those who came in a controlled, legal manner, don't you?