In the words of one of the moderators of that blog,
This just says something about the mindset of those people [Christians] - their detachment from rationality, their self-centeredness, their narrow-minded certainty about most things.Now, imagine if any other group was referred to as "those people", or if those comments were made about any other religious group. I can think of at least one religious group whose members might kill you for writing similar comments about them.
Of course, it's fair game to criticise religious people for what they do. But, it's wrong to criticize people for their religious beliefs.