A scientific understanding of anything is necessarily based on testable predictions in the material world. This does not in any way exclude the religious underpinnings behind questions of ultimate issues beyond the scope of science (e.g. Why are the laws of physics the way they are, rather than otherwise?).
The notion that ID is inherently "unscientific" is patent nonsense
What testable predictions does ID make?
That organized matter operating under predictable laws will be found.