The story is admittedly short on details. For all I know it could be a false flag. The name and location of the school are not provided, nor is that of the teacher, anyone from the administration, or the complainant.
All we have is a gratuitously profane and typo-laden note allegedly written by an irate parent (who incidentally self-identifies as a liberal). But that note, encapsulated in a tweet by someone who uses the handle Brutalist, speaks volumes about where we are as a nation and the certain risks that await us and future generations if the political correctness insanity goes unchecked.
Be warned: The language in the note is quite salty.
— Brutalist (@brutalistPress) January 28, 2018
Assuming this note and the incident described are authentic, consider how utterly galling the attitude of the teacher is even after the father provides a logical explanation that blows away her radical assumption.