I was speaking to a priest friend the other day regarding the Jesus Seminar group and he mused, "...they are certainly an odd bunch. I call them the fundamentalists of the Left. Just as the fundamentalists on the right hang their hat and their faith on the fact that everything in the Bible is historically accurate, this bunch claims that nothing of the Bible is historically accurate except the few verses that support their way of thinking."
The following is a video of an evangelical author from Varsity Press speaking of his new book regarding such scholarly goofinesses, and the "whys" of such fabrications. His insights are clear, and point to some very practical and temporally based reasons for their manipulations.