The fact that some people consider creationism and ID to be equivalent does not mean that they *are* equivalent, regardless of whether those people are evolutionists or creationists.
I assume that a creationist believes in the Biblical account of creation. But I also assume that Hindus, Buddhists, and Muslims believe in intelligent design without believing in the Bible. And some scientists came to believe in ID through science rather than the Bible. Yes, it's true. As a matter of fact, I myself believed years ago that evolution was essentially proven, but Michael Denton's book woke me up. And as far as I know Denton is an agnostic.
No doubt. Now why not address the point that a textbook on one can become a textbook on the other by simply replacing one word by the other word?
But I also assume that Hindus, Buddhists, and Muslims believe in intelligent design without believing in the Bible.
Certainly not Buddhism, which doesn't even subscribe to a personal deity.