LOL, nonsense, Reagan was no libertarian and distanced himself from them even in that 1975 interview when he was trying not to offend them.
You are seeing libertarians defend the homosexual agenda on this very thread, just as you see on every libber thread, you are doing that in that very post when you call to end marriage and just let everyone just make up there own definitions.
Actually they can already, anyone can and always could, it just wasn’t legal when it came time for divorce or death, child custody, inheritance etc, or in the military for instance, one of the countless places where the government has to decide which soldiers are legally “married”.
The objection I have to homos in the military is that they are thrown in with straights. If they had separate units for queer men and for queer women let them serve. However, don’t make straight guys and girls shower, etc. with them.
As to marriage if government didn’t give special privileges to married couples it wouldn’t be an issue. But we already have a problem with Mohammidans insisting on their religious laws be recognized in civil matters.