3) And the biggest reason of all: creation does not reveal a moral, loving Creator behind it all. Good Grief! If a scientist made an alligator with ten foot legs, we'd say he was an evil nutcase but that's what "God" did with dinosaurs! And there's mosquitos and liver flukes and guinea worms and cancer and other horrors wonderfully made (!) to adapt to their surroundings! I guess you could say I believe in some sort of ID but not with a personal Creator.
Your reasoning assumes that things like cancer were a part of the original created world, and not due to the consequences of the fall. see for example "Did God make Pathogenic Viruses? etc. http://creationontheweb.com/content/view/3772/
How can non-creationists say for sure that cancer, parasites, suffering, and death, are bad when such things (acccording to most of them) were part of the processes that brought man into existence? Furthermore, how can they make judgements on what is moral when (according to them) their sense of morality is the product of an evolutionary process which selects soley on short-term survival value and not on moral value.