Most Americans really don't care much about this issue.
It only directly affects those who are gay. I doubt the constitution will ever be changed for this purpose. Nor should it IMO.
You're wrong. We are all born into the family. Its fate affects all of us regardless of whether we never marry and for those of us who do, it affects the health of our relationships and the welfare of our children. When the American people have the opportunity to affirm marriage, they have done so over the opposition or ignorance of our elites. The Senate may be closely divided on this issue but the vast majority of the American people know we need to preserve and strengthen it for posterity.
If you're right (and I don't believe you are), the solution to that problem is to have leadership speak up and warn the public on the importance of this issue. We have a president who can, but too many weak Senators.
If homosexual marriage is allowed, there is no rational basis on which to outlaw polygamy, incestuous marriage, and child marriage. There are individuals who want these kinds of marriage, and they will get what they want, once marriage is no longer defined as between one man and one woman.
....It only directly affects those who are gay....
Unitl your health insurance and taxes go up to pay for people who have 5 times as many partners as heteros.
And until your kid becomes one and you have no grand kids, or your is taken away by the state for gay adoption...
I would disagree. I think the definition of marriage, as government defines it, strongly impacts everyone, because it concerns adoption, public schools, and the general cultural force of government.