I don’t think the entire EF would have to have homophobic views. Just Arendelle. That way Anna is going against the traditional views of just her people, but the SB/EF folk are more welcoming. It all leads up to “this is where we truly belong” sort of storyline.
Yeah I suppose it could be just a few select sections of their world. On the other hand, the sense of acceptance in her storyline won’t be as potent if the realms of the characters we know aren’t anti-gay, because who would really care about the views/traditions of some random kingdom 4 seasons into the show (which, like Oz, we will probably barely get to know)?
Another way to do it is to have Arendelle be the only kingdom in their world not to be homophobic, and have the queer queen create conflict between her land and others, as opposed to having an internal conflict in her own kingdom over it. Perhaps the heat on Elsa (intended :D) will come from a pressure to conform to international standards rather than the views of her own people, and Anna could be the only one in her court telling her to be true to herself and not buckle to the pressure.
"so there’s this new show….."
"there’s lesbians in it"