I have never understood creationism... it is so out of touch with reality and so disconnected from any logic that it defies any explanation. Yes, it might have been somehow compelling 500 years ago, when scientific evidence for pretty much anything around us was scarce, but by the last century, there were no reasons to stick with it. One has to have some really strong cognitive dissonance going in order to remain in the pure creationism camp (the earth being 6000 years old, geological strata deposited by a great flood, etc). Even the newer incarnation of creationism, Intelligent Design (ID), does not pass logical and scientific analysis, because it bases itself on faulty understanding of physics and biology.
To illustrate my point I give you the latest Science vs. Nonsense Debate:
What's even more interesting than the debate itself, was an "experiment" done right before it took place, when a reporter asked a bunch of people coming to see the debate to write questions for Bill Nye. Here is the result:
22 Messages From Creationists To People Who Believe In Evolution
Some of those questions are pure gold... and for most of the people who have even the basic understanding of science, they are either nonsensical, or very easy to answer, but there are two sources that are worth reading:
Phil Plait's Bad Astronomy Blog: Answers for Creationists
Steven Novella's NeuroLogica: Questions from the Nye-Ham Debate