>>So, did god design the AIDS virus too?<<
That is a twist on the old phrase, “How could a loving God allow all the suffering in the world?” The answer? Sin. How did the aids virus get to people? How does it spread? Are there innocent victims? Yep, just like in car accidents.
For a good read on this whole concept, read “The Problem of Pain”, by C.S. Lewis.
But you were specifically talking about design. Did god design the DNA for the AIDS virus? Human behavior may contribute to its spread, but where did it come from?
To the contrary, Judeo-Christian Scriptures teach this we are a desperately screwed-up, fallen race on a cracked planet where everything is somewhat out of whack. What we see around us (and in the pathology laboratory) is not the Universe in the pristine state: what, with your permission, I'll call God's Plan A. From Romans 8:
"For the creation was subjected to frustration, not by its own choice, but by the will of the one who subjected it, in hope that the creation itself will be liberated from its bondage to decay and brought into the glorious freedom of the children of God. We know that the whole creation has been groaning as in the pains of childbirth right up to the present time."
There you have it. In the beginning, everything was "Good." By the time Paul was writing, everything had been subjected to "frustration" and "bondage to decay." You'll probably agree: it's Not-So-Good.
I don't think the AIDS virus was part of God's Plan A. I think it developed subsequent to that catastrophe which took place right at the dawn of the human era. It may very well be a degenerated fragment of a living organism that used to be good. But everything has been subjected to some kind of univeral deterioration, universal entropy: "bondage to decay."
God did not create sin or death. In Christian theology, they are among the countless results of that cosmic catastrophe known as "The Fall."