Mattcos,
Firstly, I think ‘The Exorcism of Emily Rose’ is based on a true story. I have never seen it, but I have heard that the focus is really on a court case which followed rather than the exorcism itself… I’d say the topic is discussed in some form on CAF.
It’s tough to answer the question ‘where was her Guardian Angel’ just as it is for someone to as ‘where was God’ when such-and-such happened. Remember that God told Moses that he was to heed the angel that was sent to him, because the angel had been given authority by God. So if an angel is doing God’s work and we question the angel, we question God. While we cannot know the mind of God in such circumstances - the question of why bad things happen to good people- we are to trust in his wisdom. It happened for a reason, but we cannot p(name removed by moderator)oint the reason. As I said, I have not seen the film, but I often think when certain tragedies and trials such as this occur God could be using such people as a means of causing others to live out Christian values. For example - in the case of a tragic car accident it is amazing how the whole community rallies around the affected family. In such cases little squabbles they had no longer matter, they do whatever they can to help each other and the family, they turn to God in prayer… Although it doesn’t take away from the tragedy, tragedy can be a unifying experience. As to why God allows possession to take place, I don’t think we can know - some people open themselves to it by partaking in occult practices, while those who are so close to God (as St Pio and St John Vianney were) frequently experience demonic attacks since Satan wants to lure all away from God- and the one’s Satan is most in danger of losing are those who are very close to God.
Regarding giving Holy Communion to the possessed person- since Christ is truly present, infinite graces can be gained by those who receive. However, as far as I know, giving Communion to a possessed person is discouraged since the person will often not voluntarily receive (because of the demon’s fear of Christ), and so there is a danger that the Body of Christ might be abused if given to the afflicted person. Also, the demon will often ‘lie low’ and give the impression that the person has been liberated, thus tricking the family and exorcist into believing that the ordeal is over (and then Communion can be given), but often the demon will then return once the family have fallen for his deception. That is why it is constant prayer that is recommended, the Body of Christ is too precious for one to take the risk. Prayer and fasting are the main tools for the exorcist, but they themselves will get strength from the Eucharist.
I hope this answers your questions somewhat, although I’m sure others can give a more substantial response…