there are many links between religion and psychotropic drugs. Wine at communion is a common example, American Indians chewing peyote another, Islamic cultists smoking hashish (assasins) another.
There is an interesting article in TYR 1 or 2 about this topic
http://www.amazon.com/exec/obidos/tg...books&n=507846
Here is a thread where we discussed this
http://www.vnnforum.com/printthread.php?t=16436
and a link to stuff about henbane, etc
http://www.erowid.org/experiences/subs/exp_Datura.shtml