Actually, Intelligent Design theory simply suggests that the evidence makes it likely that some intelligent designer was at work behind the universe as we find it. It makes no claim as to what or who that intelligence is.
Just as you might pick up a piece of flint shaped as an arrowhead and say, "This looks as if it was shaped by intelligence, not chance," so the ID theorist looks at aspects of nature and comes to similar conclusions.
To go from there to say that the creating intelligence is God is a matter for religion, not science. The doctrine of the Trinity and the revelation that Jesus is Savior are things that have been revealed. They are beyond the scope of natural philosophy or theology or science to discover.
So, I think the pastor you cite somewhat misunderstands what ID theorists claim.
No, I'd probably say it was made by fellow humans. That's because I know that humans have made flint arrowheads in the past.
If I were on Mars and saw somethnig similar, I'd say it was probably the work of Martians, making the assumprion that they hunted (and using the fact that the properties of flint, ballistics, etc, are the same on Earth and Mars).
If I saw a Martian, I wouldn't know whether he/she/it was designed or evolved until I was able to examine him/her/it in detail; for example, if his/her/its genetic material had lots of "junk" in it, I'd have to conclude he/she/it was evolved rather than designed.