Today’s decision usurps the constitutional right of the people to decide whether to keep or alter the traditional understanding of marriage. The decision will also have other important consequences.
It will be used to vilify Americans who are unwilling to assent to the new orthodoxy. In the course of its opinion, the majority compares traditional marriage laws to laws that denied equal treatment for African-Americans and women. E.g., ante, at 11–13. The implications of this analogy will be exploited by those who are determined to stamp out every vestige of dissent.
Perhaps recognizing how its reasoning may be used, the majority attempts, toward the end of its opinion, to reassure those who oppose same-sex marriage that their rights of conscience will be protected. Ante, at 26–27. We will soon see whether this proves to be true. I assume that those who cling to old beliefs will be able to whisper their thoughts in the recesses of their homes, but if they repeat those views in public, they will risk being labeled as bigots and treated as such by governments, employers, and schools.
—Justice Samuel Alito, Dissenting Opinion in Obergefell v Hodges (2015), 6–7