I go with something much closer to 20% of people who are crazy, not rational, and/or not functioning at an appropriate level due to having some sort of developmental disability - never mind that often such disabilities are often self-inflicted.
Still the language is pretty clear as such things go. It's a simple Constitutional amendment to provide that marriage is between one man and one woman and that such unions are the only legal unions recognized by the state. Here is the language:
Sec. 6. Marriage.
Marriage between one man and one woman is the only domestic legal union that shall be valid or recognized in this State. This section does not prohibit a private party from entering into contracts with another private party; nor does this section prohibit courts from adjudicating the rights of private parties pursuant to such contracts. [emphasis added]
Since North Carolina already prohibits such unions this seems like an attempt to gin up conservative voters and get them to the polls when they don't' feel much like voting for the candidates they are presently being offered.