Actually it is their premises that I disagree with. Specifically the premise that the account of creation in Genesis I is true, and that anything that appears to contradict it must be an error, however strong the evidence against it seems.
If these students have appropriate SAT scores, or whatever test the UC system uses, then they should be admitted, with the proviso that they take remedial courses in the areas in which they are deficient. The university has this right - to make sure students are ready for university courses.
I doubt that these students are interested in careers in the sciences. If they are they have a lot of ground to make up and likely won't be successful. But why can't they be successful History, Education or Arts majors?