The most comprehensive anti-Potter Christian website that I’ve found is a cuttingedge.com:
Quote: In a particularly distasteful and lewd display, Potter tries to tempt the rightfully furious Angel by raising his pant leg and showing him his nude ankle. In this way the Harry Potter books contribute to the hidden gay agenda. When this temptation is refused, he has a malignant house spirit who embodies all the evils of stem-cell research curse the angel down.
http://www.cuttingedge.org/news/hpmain.html
Then again, the site also claims that the Pope is a powerful Necromancer who is luring people into phallus-worship, that George W. Bush is a born-again Satanist who is allied with the Illuminati and that the American Government has engineered every school shooting over the last ten years so that their locations make a huge mark of the beast across the face of the United States so I wouldn’t describe their views as being in any way mainstream.
As to HBP, I think that we've covered most of what we know or can guess in the TORC thread. Digging through it may reveal some unanswered questions, but at the moment the identity of the HBP is the main issue.