This actually happened.
A school teacher posted on social media about her desire to "ban the confederate flag" because supposedly "it is a symbol of racism and intolerance". A former student of hers saw the post, and he had this to say to her:
"This may not at first seem to have anything to do with the current topic, but it does. Your patience is appreciated. Horace Mann, former US Congressman, was instrumental in the creation of the current American Educational System. This system was based on the Prussian Educational System. In 1837, he became the head of the then newly-created board of education. His work earned him the title of "The Father of American Public Education". His new concept that "the state is the father of all children which is responsible for the education of every child" was a very noble idea, but what exactly did he mean by this? I'll explain: after the Prussians were defeated by Napoleon in 1806, it was decided that the Prussian soldiers were "thinking for themselve