Unnecessary. Just issue the statement:

In this school we teach proper English grammar. The standard pronouns are challenging enough to master, and they form the framework for understanding pronoun usage in other languages as well. It would thus be detrimental to education to confuse students with the additional burden of memorizing lists of "neo-pronouns". Also students deserve to feel safe at school, not threatened with violence for "hate" speech over pronoun usage.

Turn it around on them.

Unnecessary. Just issue the statement:

In this school we teach proper English grammar. The standard pronouns are challenging enough to master, and they form the framework for understanding pronoun usage in other languages also. It would thus be detrimental to education to confuse students with the additional burden of memorizing lists of "neo-pronouns". Also students deserve to feel safe at school, not threatened with violence for "hate" speech over pronoun usage.

Turn it around on them.

Unnecessary. Just issue the statement:

In this school we teach proper English grammar. The standard pronouns are challenging enough to master and form the framework for understanding pronoun usage in other languages also. It would thus be detrimental to education to confuse students with the additional burden of memorizing lists of "neo-pronouns". Also students deserve to feel safe at school, not threatened with violence for "hate" speech over pronoun usage.

Turn it around on them.

Unnecessary.

All they have to proclaim is that in this school we teach proper English grammar. The standard pronouns are challenging enough to master and form the framework for understanding pronoun usage in other languages also. It would thus be detrimental to education to confuse students with the additional burden of memorizing lists of "neo-pronouns". Also students deserve to feel safe at school, not threatened with violence for "hate" speech over pronoun usage.

Turn it around on them.

Unnecessary.

All they have to proclaim is that in this school we teach proper English grammar. The standard pronouns are challenging enough to master and form the framework for understanding pronoun usage in other languages also. It would thus be detrimental to education to confuse students with the additional burden of memorizing lists of "neo-pronouns". Also students deserve to feel safe at school, not threatened with violence for "hate" speech over pronouns.

Turn it around on them.