“There is nothing in writing”… yeah, you have to be careful not to leave a paper-trail that someone can use to PROVE you’re a bigoted homophobic sack of sh*t!
They will need to sue to get their rights. Every time they stop LGBT peoples rights they need to be sued. Call the ACLU, they like to take on cases like this or any lawyer who is interested in freedom and Civil Rights. Video the homophobes so you have proof what they say and do for use in court, also have your friends as a witness.