"Creation" is pretty vague. I assume you're referring to creationism? Creationism is a political effort. An attempt to give religious beliefs a scientific legitimacy. Descartes tried that. It didn't work. Creationism works less well even than his Meditations on First Philosophy.
This illustrates the reflexive attack mode adopted by Darwin's True Believers when face with questions they can't answer.
As to the OP, there are certain assumptions about "Intelligent Design" which need to be clarified. First, this is not a religious theory, but an alternative explanation for biological events that seem to have occurred outside of natural processes as we know them. Secondly, it does not purport to specify the nature of any intelligent being or beings who may exist. Instead, it acknowledges the possibility of some sort of external influence in the development of life on Earth.
This entire debate reminds me of the dissension that occurred after it was first postulated that the Sun was the center of our known universe. People who pointed out that the Moon and some stars didn't behave themselves according to this theory were condemned as heretic troglodytes until further discoveries were made. In the same way, Darwin's commendable, but simplistic, theory of how all life developed on Earth engenders hostility, rather than honest discussion, when challenged with contrary facts.
What we do know are these facts:
1. Earth seems to possess unique attributes regarding life which do not seem to be replicated in any part of the known universe (statisticians and Trekkies notwithstanding).
2. Pre- and post-life conditions on Earth do not provide answers as to what might have actually triggered the initial development of life on this planet.
3. The appearance of different life forms seems to have occurred en masse during discrete periods of the Earth's History.
4. The geologically recent appearance of human beings, possessing unique qualitative differences from all other animals, has yet to be understood, much less explained by natural occurrences.
Given what many perceive to be arrogant conjecture regarding these facts by the "scientific community," some have suggested that extraterrestrial forces may have played a role, While "intelligent design" suggests an intelligence greater than our own, it also contemplates the larger question of life itself: Are we anything more than just a curious collection of chemicals?