IMHO, another example of entitled selfishness. Just look at the language used: "I am sickened, furious and scared for my children and the students that I keep safe." I guess it's all about "my children" and everyone else can go to hell.
First off, can anyone actually cite some real examples and not "what-if"s or "what-about"s where gender-neutral washrooms have definitively caused harm? Because all I'm hearing here is this person is upset that they as a parent actually have to do their damn job of raising their kids to teach them that there are "others" in society that don't walk and talk and look like them.
Look back on history and you'll note that this kind of rhetoric is a direct echo of so-called "concerned parents" when racial integration was in the public zeitgeist.