The Constitution simply prohibits Congress from limiting "free speech". It does not prohibit private persons, companies, organizations, or in this case private schools and universities from doing so. If I own the land or building, I make the rules. If you say or post something I don't like, you will be escorted off the property and barred from returning, by court order and police presence, or self armed guards, if necessary. "Freedom of speech" is so misunderstood in this country, even by those who claim to be it's greatest supporters...........
2)Marquette, like almost all universities, is heavily dependent on federal tax dollars.
3)The federal government has a right to tell Marquette University that it will receive no federal tax dollars if it doesn't allow free expression on campus.
4)Marquette can suppress political expression on its own dime, if it chooses.
5)Marquette won't choose its peecee "principles" over tax dollars.
I understand the 1st Amendment quite well, thank you.