While that certainly makes it tough for secular homeschoolers, I'd rather focus on a passage from the "History of Life" Chapter from one the bestsellers, "Biology: Third Edition" by Bob Jones University Press:
Christian worldview ... is the only correct view of reality; anyone who rejects it will not only fail to reach heaven but also fail to see the world as it truly is.
Two things really get to me about this passage. First, in a book supposedly about about science, the book immediately closes itself off to any sort of science. You can't declare your view the only valid one, and wave off the rest. If that were the case, then we'd still believe the Earth is flat and witches caused cancer. I know the creationists would respond that naturalists do the same for those who don't accept evolution, but they'd be wrong. If a viable alternative to evolution arose, it would receive plenty of consideration. Creationism had its shot, and it's still found severely lacking any sort of merit. That's why it's completely dismissed by actual scientists today. Furthermore, you won't see a legitimate science textbook claiming naturalism is the only correct worldview. It will say that science can only deal with the natural. If you can't test it and observe it, then you can't do any science on it. End of story.
Second, this is a biology book geared towards middle schoolers that features threats of hell. Right there, the author gave up rational argument in favor of fearmongering. Kind of clever really. They're basically saying, "You have to believe what's in this book or you'll be tortured forever." Way to succeed on the merit of your arguments.
When the AP asked about that passage, university spokesman Brian Scoles said the sentence made it into the book because of an editing error and will be removed from future editions.
Yeah, right...editing error. Because that's not at all what you meant or what you believe. Right here is just another piece of evidence that creationism is not science. Even the university realizes the need to cover up an honest disclosure.