I also find this video disturbing on many levels. It shows very clearly the intolerance between people of different faiths, and the suspicion of the motives of people, even those just wanting answers to genuine questions.
I can understand why muslims would not trust the motives of the christians, and I can understand why this is the same for christians not trusting muslims. This does not make it right though.
On a side note, I think it is very rude to be filming people who quite clearly do not want to be filmed. I think this is an intrusion, and invasion of the persons privacy, (particularly when they were asked to stop), and one that is all too common in this day and age of cameras being everywhere. The polite thing would have been to ask permission to film, before doing so.