It’s not giving anything away to say that Lifetime’s new movie “Twist of Faith” ends with its mismatched romantic leads back together, embracing on the threshold of her home. Nor does it reveal anything to note that Music and the Power of Song connect Toni Braxton’s Black Gospel singer with David Julian Hirsh’s doubting, erstwhile cantor. And it certainly doesn’t spoil the movie to mention that “Twist of Faith,” which Lifetime calls an “interfaith love story,” begins with the horrific murder of the cantor’s wife and children on an ordinary bus, on an ordinary day, in an indeterminate part of Orthodox New York. This is a Lifetime movie: love conquers all and violence expresses the persistent vulnerability of women. None of this makes watching “Twist of Faith” any less surreal.