Earlier quoted context omitted.
I totally understand wanting to be respectful, but respect goes both ways. She needs to respect the fact that her odd pronouns are literally breaking the English language for people who want to use them.
You can't 'break' a language. You either just follow its rules or flaunt them. If your output is still comprehensible - which 'it' as a pronoun is - it's still language. Back in the day English used to have two pronouns for 'you'. Was merging them both into one pronoun also literally breaking the language?
I'm not a language historian, so I don't have an opinion on your last question.