@blatham,
It's a highly opinonated piece that provides a great deal of specific information that I will assume, for the sake of discussion (and lack of desire to fact check), is accurate however that by no means renders Stewart's opinions and conclusions accurate.
Usage of the term "government schools" is not a particularly unique way to refer to "public schools" if one wishes to point out when they are run not by the "public" but by the "government." Not all "public schools" are governed by a School Board made up of elected members of the community, and even when they are, the governments of the States in which they are located (usually through Education Departments) have considerable influence on and control of how they are run.
Linking current usage of the term to slavery in America and the Jim Crow era serves Stewart in her effort to libel millions of her fellow Americans, but it is an absurd contention. It doesn't matter who used the term, or in what sense, over a hundred years ago or even decades in the past, and if it does, than why shouldn't it have the meaning Milton Friedman (who receives comparatively favorable treatment from Stewart) assigned it?
I don't dispute that at one time, those who wished to oppress African-Americans used the term in connection with the machinations of their oppression, but there are thousands of commonly used phrases that have lost any connection to their original meaning or intended utilization. To suggest that there remains discriminatory intent in the current usage of "government schools," is to ignore that a significant segment of those Americans who favor a voucher system are black. Have they somehow, unwittingly, become part of the conservative scheme to oppress them?
Likewise there are Christian fundamentalist groups who have used the term in connection with their efforts to inject Christian themes into public school curricula, and with their focus on home schooling, but it's foolish to suggest that every other use of the term is perforce motivated by Christian fundamentalism
This is simply another attempt to manufacture a "dog whistle" so as to identify anyone using it as someone sinister, vile, intolerant or anything else a progressive writer feels conservatives all are.
I certainly understand why you think it's such a great piece.