I don't know of many evangelicals who want to deny gay couples their legal rights. However most of us don't want to call it marriage because we think that word has religious connotations and we're not ready to see it used in ways that offend us.
I love the song 'El Rey.' And for years I never knew what the song was totally about. It was something new for me. I'd never sung a song in Spanish before. Then I got the translation and saw what a really cool song it was.