The benefit is to help other non-believers (and perhaps a few believers) realize that Armstrong's article (and defense of religion in general) doesn't fit into the category of "Respectable beliefs I disagree with", it fits into the category of "Intellectually dishonest nonsense that should be scorned and ridiculed".
If the benefit of scorn and ridicule is just to inform others about what to scorn and ridicule, then I don't see the point. Scorn and ridicule aren't terminal values.
It's a benefit closely related to breaking the taboo that protects religious beliefs and raising the sanity waterline.
That would be true if the ability to deride were a reliable signal of sanity. But derision is cheap; it's a tool that is equally available to the insane.
One of the things that keep religion alive in western society in the 21st century is the dogma, widespread even among atheists, that even if religious beliefs are false they're sane enough to deserve respect. In other words, most non-believers treat mainstream religious beliefs as if they were like the belief that the Washington Redskins are going to win the 2010 Superbowl rather than like the belief that Tom Cruise is the son of Xenu, Lord of the Galactic Confederacy.
The first step towards a society in which ridiculous beliefs are acknowledged to be ridic...
A monthly thread for posting rationality-related quotes you've seen recently (or had stored in your quotesfile for ages).