While we offer friendship to all, we do not offer--or should not offer--to take the fruits of the labor of Americans, to bestow on those who may envy our achievements. Of course, anyone may contribute to others, from their own labor--but not from an involuntary neighbor.
Similarly, we owe it to our posterity to preserve the lands and resources, with which we are Blessed. We no longer have a largely unsettled frontier. Many of the still vast unsettled areas are not really suitable, or if suitable, have other reasons not to be conducive, to new settlements--even of immigrants from nations that share more of our cultural values, than do those from South of the border.
If you would care to study American history a little better, you might learn that Thomas Jefferson made the vast Westward expansion possible by purchasing the Louisiana Territory from the French. If you looked more clossely yet, you would learn that his motive was his considered need for a barrier between Anglo & Hispanic culture. He was not hostile to the latter; just aware that the two were not really congenial.
I’m not talking about the duty of Government. I fully accept that it’s primary function is the protection and preservation of the people that elected it and the constitution that enabled it. I’m merely talking practicality. You have an illegal immigrant problem. Its a real and very significant problem. Building a 1900 mile mega wall is not the solution to that problem. It simply will not work.