Well, I don't think this guard was trained and told to stop every transsexual female from going to ladies bathroom !
This was his personal choice, his personal rudeness, his personal stupidity, his personal issue he got with trans-women.
Don't leave it like that, go there, grab this men's name and alarm his supervisor or whoever is above him.
His job is not to protect cis-people from "sick, bad trans people", what he did was his personal issue, do sth about it!