Here is why I think future generations wll find that so shocking:

• Same-sex marriage is not a tax. It doesn’t cost anybody anything, unless they choose to go out and get a marriage license to marry their partner.
• There are no penalties if you choose not to get a same-sex marriage. It’s entirely voluntary. If you choose not to marry a partner of the same sex, you won’t go jail or face a fine.
• Same-sex marriage is not a mandate. Businesses and local government will not have to do anything to adopt to the change, and indeed all of the same tax forms and paperwork as it continues.
• Nobody loses any rights under same-sex marriage. Don’t like it, then don’t marry somebody of the same sex.

People who oppose same-sex marriage are really going to look backwards, when we look back, years from now.