Would everyone please use "privilege" and not "right"? The legal benefits of a government recognized marriage are privileges, not rights. Government can grant privileges not rights.
I understand the demand for equal treatment doesn't change though.
Marriage is both legal and social, and the two are heavily intertwined (hence the religious objections). The recognition itself is, arguably, a right. The argument is then that the government should respect the right, not "grant" it.
I understand the demand for equal treatment doesn't change though.