In a utopian world, every child has the right to an education, and I am willing to conceed that "every industrial democratic nation gives free education to all children who live within it's borders," for arguements sake.
However, I am not aware of any great number of so-called "democratic industrialized nations" that have as poorly enforced immigration and border policies as the U.S. The situation here cannot obfuscated by saying..."gee them other guys do it so it makes it ok if we do too." This is the same arguement I get from my teenage daughter, and it is irrelevant.