I don't see it so much as dealing with Liberals, as dealing with Theorists. In theory, wouldn't it be nice to welcome all the poor into our nation. Let's open the borders. These Theorists are not the same as the practitioners who now have to deal with the fall-out of their theory while they remain above it all because the doing it not their problem. It is now ours.
We the willing, led by the unknowing, are doing the impossible for the ungrateful. We have done so much with so little for so long, we are now qualified to do anything with nothing.
From a substitute teacher's point of view, here is my reality. Classrooms are over-crowded. They include a handful of students who do not speak English. Naturally, we do not have a handful of translators for all these different languages there to help. In presenting any given lesson, there are always a few students, speaking English, who need additional help understanding. However, I have others who need even more help understanding what I even said. (Sign language and having students who understand lend a hand as well. Which means they can't work on their own assignment as they are busy helping. And, while helping is good, they are losing time when they should be working on their own lesson.) Add in discipline problems inherent in crowded classrooms...well you get the idea.
I think all these Theorists should know why their student is not getting the education/help to which they are entitled. These Theorists should know why too many great teachers are leaving their chosen career. While Theorists are patting themselves on the back for lifting burdens from illegal immigrants, they are blind to the fact that they are placing unbearable burdens to those in every profession, every walk of life in their own country, while they are happily skipping above the mess they created for others.
That's the problem with Theorists. While they may clearly see a true problem, they are utterly blind to the true problems they are heaping on their own country's citizens that they obviously feel they are above lending a hand with.