The Christian Right has framed this as "defense of marriage." Critical thinkers should ask; Defending it from what and why does it need defending?
Ultimately, NOBODY has ever provided a single argument that supports the notion that one couple's gay marriage in any way affects any other couple's "traditional" marriage.
The TRUTH is that proponents of Proposition 8 and similar initiatives are taking this position SOLELY based on their interpretation of scripture. However, they know the pitfalls of a campaign based upon "the bible tells me so." Thus, we end up with all of this tortured logic and a campaign based on unwarranted fear. It is the same selective observation that leads people to argue that the earth is 6,000 years old rather than 4.5 billion and that Darwin represents a flawed theory. This is exacerbated by a messianic zeal to impose these beliefs on others.
Prop 8 SHOULD be overturned. It is the job of the judiciary to protect minorities from the tyranny of a majority AND the court should respect the establishment clause.
The Boiled Frog
http://www.tips-q.com/content/talking-points-regarding-gay- rights