In hypnosis we call this a "yes set". You get someone to agree with something minor, then get them to agree with another minor or ambiguous thing then they're more than likely to agree with the third because the brain likes consistency.
The WT are introducing a basic bible idea (yes), then another (yes) than a cult message (yes).
Interesting point, they build people up by making them feel smart, then if they really want to keep that feeling they have to agree with WT on everything. It fails when you don't even believe the basic nonsense anymore.