Less than a century ago, 30 out of 48 states had bans on interracial marriage. People's "fundamental faith" claimed that race-mixing was immoral. (Quote: If God had wanted the races to mix, he wouldn't have put them on separate continents.) Even when the Supreme Court nullified those bans, 72% of the public was still against it. The Constitution determines whether laws are just, not the prejudices and bigotry of the public at the time. -- By the way, if same-sex couples get married, it doesn't make marriage genderless. Everyone has a gender. Straight couples continue to marry in states that allow gay couples to ALSO marry.