But he didn't do that!
He just said that science teachers should be free to discuss creationism, i.e. why it isn't science.
The creationists couldn't have asked for a better outcome. They have always claimed that scientists "believe" in evolution as if it is was a religious faith, and that they won't tolerate criticism of their ideas or other beliefs. Scientists always said that was nonsense... and yet, now we have an example of a man who has been persecuted for speaking out of turn.
The greatest threat to science isn't the creationists, but the armies of Dawkinsbots who defend "science" with fundamentalist fervour. If you're going to fight creationism, you have to stick to the facts, otherwise you're as irrational as they are.