I see Cruz staffer initiate contact with a wave. I'm hearing something like, "Got a good book there ?" "Yes sir." "Are the answers in there ?" "Especially in that one." What the OP wrote is illogical; Rubio's body language and tone doesn't match the proffered transcription.
Yeah, it just made no sense. Rubio isn’t stupid enough to say something critical of the Bible in front of a crowd of people, most of whom are operatives of the opposing campaign.