Hard to tell for this article, but I take it that it’s the John Birch Society folks who are afraid of COS.
My experience has been that our most vehement opposition comes from folks who self-identify with either The Eagle Forum, the John Birch Society, or both.
With but one exception back in the mid-60s when they supported using Article V to pass The Liberty Amendment (to abolish income tax), they have opposed every attempt by any group to use the Article V path to amendment proscribed in the Constitution, regardless of the issue.
They have actively fought Article V efforts to pass a Balanced Budget Amendment, a Congressional Term Limits Amendment, a Pro-Life / Anti-Abortion Amendment, and an anti-flag burning amendment.
The interesting this is that, like most hypocrites, they were for it before they were against it!