Anyone who's missed this trend over the last 5-10 years has been living under a rock. Let's start with the disturbing common trend of conservative speakers being literally violently attacked by liberal students -- and sometimes faculty members -- after being invited to an on-campus event:
Gay conservative pundit Milo Yiannopoulos’s speech on the University of California Berkeley campus Wednesday night was cancelled after violent rioters shut down the university, setting fires that turned the campus into what CNN anchor Jake Tapper described as “an inferno.”
Video shows rioters violently attacking Milo supporters and people wearing Trump apparel, mercilessly spraying them with pepper spray. The rioters claimed in a press release that Milo is a “tool of Trump’s fascist government” and “has no right to speak at Cal or anywhere else!”
Here's an example, common among Universities now, of allowing free speech only within certain designated "free speech zones". This one led to a lawsuit:
"The student, Mr. Uzuegbunam had tried to comply with the rules at his school, Georgia Gwinnett College, [a campus] that sprawls over 260 acres. The college had designated two small patches of concrete as “free speech expression areas.”
By the calculations of Mr. Uzuegbunam’s lawyers, the areas in which free speech was permitted — a patio and a sidewalk — amounted to .0015 percent of the campus.
The free speech zones were available only for four hours on most days and two on Fridays. Students could reserve them once every 30 days.
When Mr. Uzuegbunam [began to speak] in August 2016, he was in one of the free speech zones. Indeed, he had reserved the space, submitting a free speech area request form three business days before, as required by the college’s elaborate freedom of expression policy.
“All I wanted to do,” Mr. Uzuegbunam said at a news briefing, “was to share with other students the faith that has changed my life.”
A campus police officer [told him that] public speaking in a free speech zone amounted to disorderly conduct. Mr. Uzuegbunam sued..."
There are countless other cases, such as students being expelled or professors being fired for making politcially conservative remarks on social media and/or joining conservative political organizations. Berkeley
settled a suit over its policy of charging the campus group Young Republicans several hundred thousand dollars to allow a speaker to visit the campus, whereas their Democratic counterparts were charged nothing.
Three more out of several hundred:
"At UC Berkeley, a conservative activist was attacked by two men while recruiting students for Turning Point USA..."
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"A student group threatened incoming freshmen at the University of Texas that it would post their public information if they joined any conservative club on campus...."
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"Three individuals were arrested for aggravated arson after setting a dorm room door on fire in March at Tulane University in New Orleans, Louisiana. The student living in the dorm room was the president of Tulane’s Turning Point USA chapter, and had recently been “doxed” by other students seeking to expose members of the group..."