Hearts and minds are more easily influenced by the status quo than one might think. People whose opposition wasn't obsessive tend to take note of the fact that they know some friends of friends who had one of those gay marriages and they're apparently very happy, whilst their pastor who gave such eloquent warnings about the impending moral breakdown of America whilst the anti-gay-marriage ballot initiatives were being drawn initiatives has changed the subject of his moral crusade to something else, and above all it doesn't really doesn't seem worth revisiting the issue or worrying about homosexuals at all when they could be mobilizing to save unborn babies, their constitutional right to lethal weaponry or the immortal soul of their atheist nephew. When change is less drastic than you feared, it becomes easier to accept than you anticipated.