The author certainly has a snide attitude, but I think this info makes Brat all the more interesting, at least.
The term "Calvinist" is also highly generic. They range from some of the very tolerant (or traditional in the conservative sense) Presbyterian sects to the "my way or the highway, anyone who doesn't believe exactly like me is going straight to hell especially Mormons and Catholics" who haunt this forum from time to time.
Religious bigotry is a libtard value, not a conservative one.