If there's a difficulty with Intelligent Design it's this: which intelligence? God? gods? aliens from another planet?
There's more at stake than merely Creationism in the back door. To say "yes" to ID might also give credence to the claims of Scientology (maybe the Thetans are the intelligence) and of pagans (maybe the intelligence is that of the planet itself, or of Zeus, or Odin, or any of a large number of imaginary deities).
If I'm supportive of ID, it is a careful and cautious support. The ID bandwagon is not immune from hijackers.