You can be a scientist who is also a creationist (they are rare, however), but there is no such thing as "creation science". The religious underpinnings and justification for creationism are just that - religious, not scientific.
Creationists aren't "stupid" - but they are fanatically devoted to their religious beliefs. God created the world, and to them, that's the end of the story. Their belief is true, because to them, it just IS. There is no scope or room for argument with genuine creationists. Any proof you give that their biblical account of creation might be wrong will inevitably be written off as "not good enough" or "a conspiracy by the secular humanists" or "lies" or, in the worst cases, "planted by the devil". You've even got creationists who believe that God INTENTIONALLY created the world to make it LOOK like it is 6 or so billion years old and that life evolved, because he wanted to "test our faith".
Creationists are never willing to even hazard a thought that they might be wrong. They never offer hard and fast rules on the falsifiability of their own theories, and as such they are not scientific theories. Just once I'd like a creationist to openly say "If I saw X, I'd stop believe in creationism".