"if it can't offer a scientific response to the question of how the "intelligence" came to be."
Understood but I don't think that changes anything. Where did the matter and energy from the "Big Bang" come from? Anyone?
What does that have to do with the theory of evolution?
The Big Bang has nothing to do with evolution. It is a cosmology/physics problem and there are a lot of graduate level proigrams studying that very question. I guess we should cut off their funding becasue ID has the answer and they don't need to do that research.
There is a fundamental distinction between the origin of spacetime and the origin of a hypothesized designer. If we assume that the energy of the big bang was "just there to begin with" and then describe what happened, we arrive at a perfectly valid theory. That's because, contrary to the popular characterization of the theory, the big bang theory doesn't really purport to explain the origin of the universe, merely to explain certain observations, such as the cosmic background radiation and the red shift of distant galaxies. Other ideas, such as certain ideas about quantum fluctuations in spacetime, coiling up of certain spatial dimension, etc. may provide the explanation of the origin of energy.
In contrast, ID does purport to explain the origin of the complexity that we call life. Presumably, to exhibit intelligence, a hypothesized designer must possess the very complexity that said designer is introduced to explain. ID then is tantamount to stating that life exists because some living creature created it. Certainly that's no explanation of the origin of life. Unless ID'ers are willing to identify the designer with an eternal being, ie. God, then ID has an inherent logical problem. If life, including intelligent life, is too complex to have formed naturally, then how did an intelligence exist to do the job?