This article also contains one of the strongest reasons that Atheist proselytizing is important:

"Imagine a man walking through a room on planks of wood suspended over spikes with large holes to fall in if you take a wrong step. He always manages to take the right next step, but he is never afraid because he "knows" that this is a solid wood floor he is walking on. Now turn on the lights."

Although it's intended as a metaphor to describe how frightening deconversion can be, it also illustrates how much of a moral obligation there is to deconvert.

I have friends and family that are various degrees of theist, and as long as they hold reasonably secular political stances I don't bother arguing them, but mainly that's due to intellectual laziness. As much as I admire the scholarly background of people like Richard Carrier I'm just not willing to learn all that much about Christian theology; and besides, as the article points out, the argument isn't really about that.

As much as I admire and defend people like Richard Dawkins and Christopher Hitchens, I'm not sure how useful their arguments are for persuading the core adherents. Maybe nothing would be enough... but I have the feeling that this might be a situation where the Dark Arts should be called into play. After all, according to this article it's the emotional mind that holds people to their religious convictions...