There's a straightforward argument for gay marriage based on bans essentially being discrimination based on sex: A woman may marry a man, but a man may not. C

There's a straightforward argument for gay marriage based on bans essentially being discrimination based on sex: A woman may marry a man, but a man may not. Chief justice Roberts made this point during arguments in obergefell v. hodges. And you're incorrect about the timeline. Gay marriage was approved of by a majority of Americans somewhere around 2011-2012. The supreme court decision was 2015. See my other comment in this chain for polling data.