Perhaps Clayton Weatherstone and Ferdinand Ambach should have tried that tactic in court.
"Your honour, I stabbed her repeatedly to let the wickedness out!" or "I beat him to death with a banjo in order to exorcise his perverted demonic homosexuality! I was only trying to help ..."
If that seems wantonly nasty-minded on my part, you haven't absorbed the facts fully. A woman was killed through the inept stupid brutality of a bunch of morons in thrall to some particularly idiotic ideas about evil spirits. A woman died because of unacceptable ignorance and stupidity and superstition. The people who killed her get community service - what community wants imbeciles who think people are possessed by the devil in it? - and she gets to be dead. Forever. That's the truly offensive thing here.
Utterly, utterly disgusting.
1 - As described previously on lefthandpalm: http://lefthandpalm.blogspot.com/2009/07/breaking-news-women-less-deserving-of.html
2 - "Bungled exorcism was a 'crime of love'," unattributed NZPA article. Published in the New Zealand Herald, 14th of August, 2009. (http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=10590822)