Not just bigots; but some curious subset of bigots. This article is the first time I have ever heard a “important thing in woodpile, implied to be concealed” as a figure of speech, whether in an overly bigoted flavor, a thinly reskinned version, or rebuilt around something else entirely that you might also be concerned about inhabiting your woodpile (like, say, the various animals that might well bite you for extracting some wood from their lair pile).
I assume that there are people at the intersection of “bigot”, “cultural experience with wood burning”, and “pre-civil-war references considered relevant”; but that’s kind of a specialized group; and so far from being one I’d expect to find a Tory MP in that I find it a trifle hard to wrap my head around.