Beware final impenitence.
I'm not sure they are possessed though.
You heard the story about the guy in Washington who cursed the hospital chaplain out of the room? Most Catholic bloggers heard about it by now. There may have been some misunderstanding, I'm sure, but some are calling it a gay ambush. I don't think so. I'm not sure what happened but it sounds to me as if a gay man, who asked for the sacraments, didn't think homosex is a sin, and a sincere priest felt he couldn't administer the sacraments if he wasn't in the state of grace. The patient, evidently not willing to be reconciled - the priest, in his charity, offered to pray with him instead. Something like that, I guess.
Then the guy goes all Walt Kowalski (Gran Torino) on the poor priest, and the priest - respectful of 'patients rights' quietly excuses himself when told to 'get the f--- outta the room' by the patient. There is a media-skewed version of that story here.
Anger and resentment sets in and eats away...
Fr. Z has another story of ungodly gay rage at a priest from a transsexual would-be parishioner. The transsexual contacted a priest to ask about coming to church - priest told the person fine but some parishioners might be uncomfortable. Priest doesn't see any transsexual at Mass, emails the person back, wondering if the person was still interested. Long story short, the transsexual went crazy in a reply email using the F-word worse than Kat and Digit ever would, thus freaked the priest out, which moved him to write to Fr. Z wondering if the devil made the transsexual respond like that, or what? Story here.
Not always the devil.
People have their own disorders which can be exacerbated by all sorts of issues, from mild depression to raving drunkenness. If they are deeply wounded and worse - trapped in a sinful life - a slave to sin, as the Gospel says - they kind of have one foot in hell already. If we live in a state of mortal sin - we can be worse than the devil - we lack charity. If we drink and get drunk we can be a bit out of our senses, judgement impaired and out of control. If and when we get a nice email from someone we think is holier than thou and hates us or our sexual inclination, we can go nuts and be as vile - or worse than the worst demon.
Mortal sin separates us from God. If we die in mortal sin we are damned. Just as a holy contemplative like Elizabeth of the Trinity could say she lived in heaven on earth by faith, an anticipation in loving, interior recollection*, the opposite may be true as well. So maybe, just maybe, one can conjecture that a soul in mortal sin, obstinate in mortal sin, can be living a sort of anticipated hell on earth. Certainly rage and hate spring from a place of pain and suffering and blind rejection.
The devil does his thing, and he is the author of these things, the father of lies - but we always have free will. Gay pride can keep a soul from being reconciled with the Church, the Body of Christ - God.
Postscript
In fairness to the priest who wrote to Fr. Z - I'm convinced - through experience - that there is indeed a diabolical element to the sexual-gender-revolution, as the priest suggested in his email to Father:
I have to admit that this left me deeply disturbed. I’m beginning to seriously wonder if there might be a demonic element [YES] to segments of the sexual liberation movement, and now I think I have a glimpse of what people might be thinking when I get hostile looks while wearing my Roman collar in public.
Ask your readers to pray for us. Ugly persecution is coming. - Fr. Z
I agree. I will be praying for Fr. Z and priests even more. As well as the conversion of sinners.
Now I need to go to confession.
Scene from Gran Torino
*BTW - This is why the penitent sinner must strive to practice prayer. The prayer of recollection keeps the soul fortified within the interior castle of grace - the soul in the state of grace - the presence of God, safe and secure from the onslaught of hell.