I only discovered this post recently, but it does a fine job on a rather sad piece of work by people who, except for their religious commitments, would know better.   One of the authors of the article being critiqued is actually a PhD student in philosophy at Princeton, like Chappell!

UPDATE:   Here are some things that really "betray the vocation of philosophy":  (1) making horrendously bad arguments, and doing so repeatedly, despite patient and decisive refutations; (2) failing to acknowledge honestly the role that conclusions predetermined by religious dogma play in your purported philosophical inquires; and (3) accusing your critics of "name-calling," when you know full well that names have descriptive and referential content, and the only question is whether an accusation of bigotry is warranted or not.