In what sense has the supreme court "nationlized" most of the protections set out in the bill of rights?

1. What was the issue of Board of Regents of University of Wisconsin System v. Southworth and how did the Supreme Court rule on the case? What does the court's ruling suggest about how the court may be willing to look for compromise in cases such as this?The University required their students to pay a segregated activity fee that supported various campus services and extracurricular student activities. Some students sued the university alleging that the activity fee violated their 1st amendment rights. Court ruled that if a university determines that its mission is well served if students have the means to engage in dynamic discussion on a broad range of issues, it may impose a mandatory fee to sustain such dialogue.

And this too use this if needed