Converting an indian to Christianity: Religion Relies on Ignorance

So, apparently, no one can tell if this is just brilliant acting, or seriously messed up kids.
Unfortunately, I think it's the latter:

The question becomes: How does ignorance play a part in Religion?
What if the answer is that Religion RELIES on ignorance? That Religion cannot exist without Ignorance?
My favorite moment is at 8:57 when Sara just makes a decision for them...