Dixon plays this gambit again when talking about evolution and creationism:
The debate about evolution and ID is a conflict not primarily between science and religion but between different views about who should control education.
But why is the control of education such a contentious issue? It is because fundamental questions about sources of knowledge are at stake. Young-Earth creationists believe the Bible constitutes a source of evidence that trumps anything a scientist might discover. Furthermore, failure to recognize that fact places your eternal soul in danger. From the other side scientists believe (with considerable justice, I would add) that their methods are far more reliable than those of religion. Failure to recognize that fact assaults reason and rationality themselves. The ID folks are religiously more diverse than the YEC's, but the source of the dispute is effectively the same.
How is that not primarily a dispute between science and religion?
If I thought that education was such a contentious issue because of the conflict over sources of knowledge, I'd have to agree with Jason. But I'm pretty sure it's not. It is true that creationists have a very different view of what constitutes an appropriate source of knowledge about the physical world than most scientists do, but that is not the source of the education conflict. If the creationists were willing to teach their views only in their churches - something that nobody challenges their right to do - the conflict would not exist.
Look at the Amish, for example. I'm honestly not sure what their view of evolution is, but I strongly suspect that a group that is religiously opposed to automobiles, television, and electric lighting does not view science as a source of authoritative knowledge. Their views on these topics do not create controversy because they have no problem with keeping their beliefs within their own community. They do not ask to be allowed to require our children to be educated in accordance with their views; they educate their children themselves, and leave the rest of us alone. Their views may be incompatible with science, but they do not cause controversy the way that creationists do.
The conflict arises when creationists attempt to force their religious views onto the children of other people, who do not necessarily share those views. That's not a dispute over what the most authoritative source of knowledge is; that's a dispute over the exercise of secular authority. In other words, it's a political conflict.