The first half of the film was ok, I thought they might actually be trying to do a "realistic" exorcism film. The pregnant girl being possessed seemed quite well done, and as we kept on being told, there is no physical evidence, you (the priest) have to just believe... But then loads of physical evidence started to happen; coughing up nails, doors cracking open, candles blowing out, bracelets being chucked all over the shop. Like, surely someone would say "Hey, this is physical evidence, isn't it?"
And if all the possessed folk just shout "fuck off priest!" how come when Anthony Hopkins is possessed he's extremely eloquent? He's Hannibal Lector again! I reckon that was just the way he taught every priest how to be an exorcist, just pretend to be possessed and let the kid say all the spells. "Well done, you passed! Next!"