They were ALL in on it!

The entire bit with the "12 Disciples" was fake, and they were all in on it.

The field-trips that didn't involve the main 12 were probably 'real', in the Borat sense, that the cult and the other fake gurus believed he was "Kumare". Notice, he was a little more slick with them (like drawing a penis on that guy's forehead). But, the 12 main "characters" were fake-as-Hell, and the AUDIENCE that believes otherwise are the real suckers in this big prank.

The biggest give-away is how those scenes were ALL so perfectly shot, with excellent lighting and framing. Note how no time-line for the project is ever given, which is because that portion was shot over a few days, rather than over a few months; which, if you watch it again, you can feel that time that it's trying to insinuate for these relationships to build isn't really happening.

Though the 12 certainly weren't professional actors, they were definitely playing characters...who all had different stories, but were essentially repeating essentially the same script about how they felt about 'Kumare'. They seemed like bored suburbanites who answered a Craigslist ad to be in a film, like the semi-believable fakes you see on Springer and Maury.

It's a somewhat entertaining film, but if you think the whole thing is real, while you're laughing at the poor gullible suckers who believed Kumare was real...they are all laughing at you.