Waaaay too many people on this site have no idea how the analysis works and refuse to educate themselves.
There are three different levels of equal protection analysis depending upon the right/privlege infringed upon and the classification of the people upon whom the infringement is placed.
Not every group and/or every right is treated the same under equal protection.
Thus the argument that polygamy would be analyzed the same as gay marriage is simply ignorant.
Or that incestous marriage would be treated the same.