Where exactly did you hear that allegation? Be specific and provide citations.
But change "Christian" to "religious" and "Bible-thumping" to "holy-book thumping", and yeah, that describes the large majority of "IDers". Surely you can't seriously dispute this.
Which is it?
Most IDers are religiously motivated. You know this is true, so don't pretend there's something wrong with pointing it out.
We can exchange generalizations if you like, Ichneumon. I'd say that most neo-Darwinists are "religiously motivated," as well. Believe it or not, atheism is a recognized form of religious expression.