While there is still time, recall again that the US is #2 IN THE WORLD in terms of natural resources...
Good. Let's keep it that way.
...and has very low population density...
Good. Let's keep it that way.
...We have lots of room, lots of resources, a culture that assimilates new arrivals as well as ever...
We have doubled our population in 50 years... from 150,000,000 to 300,000,000.
We now have half the room we had 50 years ago.
We now have half the resources-per-person that we had 50 years ago.
...and a history of immigration...
That was then.
This is now.
We don't need large-scale immigration any longer.
If we can't find what we need by going to our own bullpen of 300,000,000+ souls, then we're in deep trouble.
...proving that legal immigrants are a great boon to the nation...
Immigration has, indeed, proven to be a great boon to the nation.
But all good things must come to an end.
Including overly-generous rates of immigration, allowed into the country.
We can probably continue down our present path for another generation or so.
But we're fast approaching the time when we're going to have to begin throttling back on that.
Especially when it comes to making a choice between re-tooling an American worker or punching a meal-ticket for an outsider.
...One of our greatest strengths...
Nolo contendere.
No contest.
Immigration has, indeed, made us stronger.
But we are now reaching the point where we are strong enough, and no longer need it, on the same scale as we have in the past.
It is probably about time to begin a serious national conversation on the pros and cons of continuing down the same path that we have historically.
Just because we did something in the past, and just because that something worked-out to our advantage, does not ipso facto mean that it will always be so.
Things change.
Criteria and conditions and populations and societies and needs change.
America also has a long history of evaluating what works, and what doesn't, and setting aside the old, in favor of the new.
Our general immigration policy is as old as the nation itself, in a manner of speaking.
But we are not bound to remain committed to such a policy, nor are we committed to facilitating any particular level of immigration, one minute longer than it is in the best interests of the United States and its People.
Nothing wrong with targeting an Old Familiar and dragging it out into the light for a long and exhaustive scrutiny over whether we should retain it, or move on to something different.
...Add to this a social security system that by 2030 will at best rely on 2 workers to support every one retiree - a snowball that will only roll downhill faster and faster after that ...
The answer to meeting short-term (until the Boomer generation dies off) demand is NOT to set the stage for still greater FUTURE demand - by admitting more eventual pensioners.
That particular madness has to stop sometime - the sooner, the less painful, for ourselves or our descendants.
...and it is obvious that there is no reason to take seriously the cowardly mewling of xenophobes and idiots who understand neither the character and history of the US, nor basic economics (hell, basic counting!).
People who oppose your perspective on Immigration are neither cowardly nor xenophobic nor idiotic nor un-educated nor oblivious to potential ramifications.
People who do not buy into your doom-and-gloom sky-is-falling speculation about a 'collapse', should we throttle back on immigration, are neither cowardly nor xenophobic nor idiotic nor un-educated nor oblivious to potential ramifications.
Spare us the histrionics and drama-queen monologue.