You think that's bad? A plane crashed today 20 miles from where I live in Pakistan and the CNN page reporting that had about 200 comments along the lines of 'Good riddance', 'Death to Muslims' and crap like that. And this was no small plane either; an A321 - 152 people were killed and you have people actually celebrating all these deaths.
There is a history of Christian fundamentalism in the United States so this isn't particularly surprising. Whilst people debate political Islam on blogs and Internet forums, to a small portion of Christians in America view Islam instead an idealogy of the devil. Their oppossition and criticism of it is different to what most people identify Islam with - a tool of violence and terrorism - instead they interpret its growth in the world as a sign of end times. Ironically, the average Church-goer in America is more likely to have more in common with the average Muslim in Afghanistan, for example, than any (stereotypically speaking) liberal commentator who sees the Muslim faith as backwards for it's views on e.g. homosexuality, sex and women.
This is where the Bin Laden as the anti-Christ myth came from.
this is just the kind of people that believe Islam teaches to destroy other religions when its in fact extremists who believe the religion teaches differently and in fact teaches them to cause suffering to those who oppose them