Whoy my friend, read it, take time to think about it ... THEN answer.
"THE REASON IS, THAT FILM WAS NOT PRODUCED BY RASTAFARIAN but only features Interviews and participation of certain Rastafari individuals, mainly from Bobo Congress. THAT'S WHY the narrator said certain things about Rasta which are not true, "
THE REASON IS, THAT FILM WAS NOT PRODUCED BY RASTAFARIAN --> THAT'S WHY ...
I don't think I expressed myself so difficult.
Why you quote only half a sentence? You also only READ half the sentence?