There's something really wrong with that community.
I think it highlights how certain doctrines (more specifically, how they're received and the sentiments they stir up in people) can have a disproportionately bad impact on people.
What's kind of interesting/puzzling about it is that we see a disproportionately large number of these sort of things coming from the Muslim community, and while there's no denying the the link between doctrine and behavior, the OT/Torah both have more references to violence than the Muslim holy books do, yet we don't typically see those behaviors as often from people who use the OT/Torah.
Obviously the saying "Every religion has their extremists" is true, but not every religion has them in the same quantities.
Some people have made the culture/environment argument, suggesting that it's because a larger percentage of Muslims live in theocratic nations where there are no barriers to exercising religious beliefs in such an extreme way, and that sort of unfettered ability to push religion has created a culture where it's viewed as more acceptable to act in certain ways towards other people, and that if the religious right in the US had their way, with no restraint of the government, they'd be doing the same thing.
But I'm not entirely convinced of that.
A poll of British Muslims done a few years back suggested that nearly 70% of British Muslims through the Danish cartoonist should be prosecuted, over half said speech should be restricted to as to not allow anyone to offend their religious sensibilities, and the more startling one... 9% of respondents said it was acceptable for religious groups to use violence.
I'd doubt you'd get those kinds of numbers if you polled the Anglicans, Presbyterians, or Methodists living in Britain.