Trick question: They're not meaningfully christian, they just claim the mantle like a shield.
This reminds of nothing more than Rev. Moon's wacky Unification Church, which eventually founded the Washington Times and bought the UPI wire service to appear legitimate (and, at least in the case of the Washington Times, curry favor with conservative politicians).
As an aside, these "debate team" shortcuts (no true scotsman, etc) might have worked really well in school but they're trite and extremely unpersuasive in real life.
This reminds of nothing more than Rev. Moon's wacky Unification Church, which eventually founded the Washington Times and bought the UPI wire service to appear legitimate (and, at least in the case of the Washington Times, curry favor with conservative politicians).