I disagree wholeheartedly. This country has historically always had a group that it has vilified:
African americans
Chinese
Irish
Italians
Jews
Japanese
Women
Overweight
Disabled
The list goes on
Once this whole mess with equality in marriage (or, to appease those that are fixed on word usage, civil unions) is resolved, there are those out there that will find yet another group to disdain and disparage. It's the way some folks' minds work. In order to gain leverage in their own small minds, they are compelled to find someone else to focus their dislike. Many of them can see themselves in the list above.
It's much easier to relieve one's small mind by focusing your own frustrations in your own inadequacies onto those you feel are the "other."
Upon reflection, I agree with your message of hope.
