Thanks for the effort on your post.
First off, the birthright citizenship came after the Civil War, not during the time of the Founders.
The Founders were not "Thrilled" with immigration. Ben Franklin was concerned about the German presence in Pennsylvania and the border was shut down up in Maine because of the French-Canadian influence.
You mention Poles and Russians as being viewed differently than Mexicans. I believe that is because Poles and Russians are not a threat to overrun our country.
Mexicans are doing just that and many are quite vocal about retaking our southwest. Also, there is a difference in importing Europeans who assimilate and Mexicans and Muslims who have little desire to do so. Of course, I want Russian organized crime to be hammered, just like we had to with Italian organized crime.
I am aware that birthright citizenship came after the Civil War, and not during the Revolutionary era, but let's not be tricksy. There was no formal immgration code in the 18th Century. Things were not standardized. If you were white and born in America, you were a citizen. There was no statute to say so, because there was nobody disputing it. It wasn't an issue.
The birthright business had to be written into the Constitution post-Civil War, not to restrict foreign immigration or to draw some sort of line in the Atlantic, but for homegrown reasons. The country, especially the South, was full of racists. The Civil War was over and the slaves were free, but white Southerners had no intention whatsoever of permitting former slaves from having full, equal rights and powers.
And thus was born the whole malicious effort to figure out a way to PREVENT the natural order of things: that native-born blacks would be citizens. Every expedient was used for one hundred years to prevent the numerous black population from having full equal rights and voting power, because that would mean a concomitant loss of command on the part of whites, especially Southern Whites.
The 14th Amendment and birthright citizenship didn't have anything to do with Mexicans or Italians. It was aimed at American whites who were trying to play legal games to prevent American blacks from being among the class of persons protected by the Constitution.
So, now the language is there.
If people have a problem with Mexicans, stop them at the border and rigorously enforce deportation procedures to empty out the illegals within America. But according to the Constitution, someone born in the US is a citizen, and that is not going to be able to be gotten around by legalistic legerdemain. If we don't like the effects of that in the 21st Century, then we have to amend the Constitution. Grandfather clauses and the like have a bad old history, and enough people don't want to go that way that it won't happen.
Building a wall and deporting illegals will work.