This isn't really a movie. It's a religious/philosophical treatise disguised as a movie. The plot is that a religious journalist has an interview with a person claiming to be god. The standard pattern of these things is that the interviewer, who is the stand-in for the audience, at first thinks he's talking to a crazy person but gradually comes to believe he is actually talking to god. The movie hopes the audience will come along for the ride and give the ideas presented the weight thereof.
The fundamental problem with anything like this is that it is so effing arrogant. I mean, could you be more self-indulgent and arrogant than to say you can define the personage and motives of the creator of the universe? Beyond that there is the secondary problem in that the movie is taking a stand of sorts on which religions are correct. If the movies espoused beliefs happen to align with your own you may not see a problem with that, but I don't care for that approach because it reduces god to a kind of supernatural parent confessing to the audience that he has a favorite child. It might feel great to hear "god" say you are his (her/its) favorite, but I have a problem with any idea that sounds like the central thesis of a religious war.
Anyway, I don't want to go into any more detail because this is a really touchy subject for so many people, but I'll just say instead that I don't think this is a very good film; it's preachy, judgmental, and not interactive. You have to sit there and listen to them regurgitate their belief system all over you, something better suited for a sermon at your house of worship then as entertainment.