Um, they’re suing over acceptance of science courses, not religious courses.
From the article in the thread on this, it appears that the UofC is not allowing those courses simply because of a statement made in the front of the textbook. I saw nowhere that UofC’s decision was based on the textbook teaching the ToE wrong.
From antievolution.org:
"Christian high schools teaching antievolution as course content in biology classes are suing the California state university system."