No way to prove it, of course, but I’m convinced at least some of them are Democrats here pretending to be conservatives in order to foment division among us. Yesterday one admitted to me that s/he is not a conservative, but a radical. Most radicals are on the far left politically, or so far on the fringe that they essentially are anarchists and/or seditionists.
The term “true” conservative is thrown around here a lot (mostly to silence or marginalize opposition to them), but at least in this one person’s case, s/he totally rejects conservatism. S/he doesn’t want to preserve (conserve) the republic and constitution, but overthrow them.
Bingo! No way to prove it as you say, but when one has no apparent purpose other than dividing conservatives on a conservative board, it's a logical conclusion to draw.
Leftist trolls, harming conservatism deliberately.