Well...let's be a little more accurate here....

About 100 students walked out of graduation exercises attended by 3,200.  Actually....reports have said "some" and "a few dozen" - including CNN.  Not an exactly a massive defection.  Mr. Pence received a standing ovation.  Those students that walked out were aided and encouraged by several left wing ideologically aligned groups, and planned well in advance after repeated contact by these groups...which included Planned Parenthood and the Indiana Reproductive Justice Coalition.

Not exactly all about Catholic Social Teaching.

Your report of Notre Dame's exercises also falls far short of accuracy.

Why?