The documentary explains why a lot of scientists wouldn't admit believing in intelligent design. They want to keep their jobs.
Also, intelligent design is contradicted by facts that are very obvious to any biological scientist. Every creature appears to be the product of a series of makeshift adaptations and re-adaptations, not the product of a design for a specific purpose. The human spine, for example, hooks up to the pelvis as would be appropriate for a quadruped, thus requiring a radical recurve to permit standing upright, resulting in a very injury-prone spine structure for a biped. That's because evolution isn't about perfect solutions. Adequate solutions will do. The human body is filled with similar observable characteristics pointing to adaptation after adaptation, rather than intelligent design.
