On Faith Panelists Blog: Why the Faithful Approve of Torture - On Faith at washingtonpost.com
this goes to a kinda lame column in the washington post about this poll: the author is one of a no doubt huge range of christians who do not see this question in the way protestant evangelicals might...the interpretation in the column culminates in the last paragraph--but the commentary is interesting, though, and raises many of the questions that seem obvious (for example whether there is a correlation between religious practices and support for torture that makes sense independently of political viewpoint--in other words, the argument is that one might be conservative politically and have supported the bush people and their rationales for torture usage independently of religious affiliation....or it could be the case that (for example) evangelical protestant churches are effectively conservative political organizations (which i am inclined to see them as being, and which i personally think should cost alot of these churches their tax exempt status--but that'll never happen)...
there's a link at the start of the column to some more extensive information about the poll as well.
the question of representativeness really should have been addressed with respect to this particular poll--but instead you find a generic page about methologies. i looked around a bit on the pew website but didn't find anything that would speak to psychodad's objections about sample.
what's obvious is that there are many types of christianity, a bunch of demoninations, and it isn't at all clear that it makes sense to talk about christianity in general, or only particular types of christianity---methodists aren't particularly like evangelical baptists aren't particularly like catholics, etc. but that would have made for less meme-friendly results.