"and that is the problem. Intellectuals have factored right and wrong, legal and illegal, right out of the arguement. "
An abortion is legal, does it make it right?
I think the point he's trying to make is that not all laws are "right" and some have to be modified to take into account real world implications.
In thoery I would support deporting all illegal immgrants but in pratice, I don't think the majority counrty is willing to (or enven wants to)put up the resources to do it because thre is a good chance it could lead to amssive tax increases or bankrupt the cotnry.
Sometimes you have to bite the bullet to correct a wrong.
The difficulty this nation would have faced in the 1810s or 1820s with dealing with slavery at that point would have been very difficult, as it was, it was let slide for political purposes and to avoid that hardship and the resulting civil war costing the lives of hundreds and hundreds of thosuands and decades of reconstruction was much, much worse.