The horrific assassination of Charlie Kirk at Utah Valley University is an unspeakable crime. But we must speak about its causes and how we can seek to reduce violence of this kind—and also how we must not seek to silence free speech in response.

Obviously, murder is an evil act in itself. But a political assassination of this kind is many magnitudes worse than the all-too-common murders we encounter every day in America.

Political violence undermines the sense of safety that’s essential to free and open debate. If controversial views inspire murder, then most of us will be reluctant to speak out honestly. Political violence and threats can be a powerful source of self-censorship. We need to end support for political violence of every kind on every side, from this terrible murder to the threats of violence against professors from all sides who express controversial views.

Political violence also breeds administrative censorship. Many of the campus bans on protests and suspensions and banishments of those accused of misconduct are done using the excuse of fear of violence. Safety becomes a simple defense for every act of repression, and Kirk’s murder may be used by campus officials to ban controversial speakers from all sides and to prohibit the kind of public discussion that Kirk was admirably engaged in when he was killed.

And political violence inspires political censorship, particularly when elected officials are looking for any excuse to suppress their ideological opponents. Donald Trump announced a campaign of retribution against leftists who harshly criticized Kirk: “For years those on the radical left have compared wonderful Americans like Charlie to Nazis. This kind of rhetoric is directly responsible for the terrorism that we’re seeing in our country and it must stop right now. My administration will find each and every one of those who contributed to this atrocity and to other political violence, including the organizations that fund it and support it …”

It’s appalling that Trump would call for unconstitutional repression of this kind to “find” and “stop” any leftist who ever used mean rhetoric—and the organizations that fund or support them. Even if you believe (as I do) that prominent political leaders such as Trump—one of the worst offenders at nasty political rhetoric—should tone down their hatred, that doesn’t mean that everyone should restrain their rhetoric, and it certainly does not allow the government to punish those who choose to say harsh words.

Since we do not yet know who murdered Kirk or what the motives were, it’s bizarre to assign ideological blame for this violence. But even if the murderer turns out to be a leftist inspired by hateful essays about Kirk, we must not punish (or even condemn) people who denounced Kirk.

We need to condemn horrible violence of this kind from any source, but we cannot blame those who engage in political critique for the crimes of lunatics. Words do not cause violence, and censorship does not stop it. It’s bizarre that the party of “guns don’t kill people, people kill people” is now suggesting that mean tweets kill people.

Other Republican politicians urged repression as the response. Rep. Clay Higgins (a Louisiana Republican) called for massive censorship of anyone who “belittled the assassination of Charlie Kirk,” calling for them to be “banned from ALL PLATFORMS FOREVER,” to have their business licenses and permits and driver’s licenses revoked, and be “kicked from every school.”

By far the most disturbing finding in the latest free speech survey of college students released this week by the Foundation for Individual Rights and Expression was that the proportion of students willing to support physical violence to stop an offensive speaker on campus grew from 20 percent in 2022 to 34 percent in 2025. FIRE chief research adviser Sean Stevens noted, “This finding cuts across partisan lines. It is not a liberal or conservative problem—it’s an American problem.”

In FIRE’s survey, the growth in willingness to use violence to stop an offensive speaker over the past few years tracks directly with the growth in willingness to shout down speakers (from 62 percent to 71 percent) and to physically block students from attending a speech (from 37 percent to 54 percent).

The willingness of people to silence speech is connected to their willingness to support violence as just one further step to achieve that repression. Stopping political violence can’t be seen in isolation from stopping political censorship of all kinds. We need to view a commitment to free speech as an essential tool to help reduce political violence.

Censorship can become the training wheels for political violence. Once you are willing to dehumanize someone by stripping away their rights and silencing their speech, the kind of dehumanization necessary to violently attack them becomes easier to imagine. And once you’re willing to use political violence, the reality will always become more likely.

Alice Dreger at Heterodox Academy noted that after the problems we’ve seen with the heckler’s veto, “The shooter’s veto is a whole new level of terrorism endangering political speech in America.” But what if the shooter’s veto is just the logical extension of the heckler’s veto?

It’s worth noting that in another of the rare cases of violence against a campus speaker—at Middlebury College in 2017, when Charles Murray was attacked and Professor Allison Stanger was injured—the violence followed in the wake of the students shouting down Murray. Censorship and violence are often linked together, and both are common weapons of totalitarian regimes.

That’s why we must reject political violence in all its forms and begin with the steps of censorship that often lead to it. That’s also why we must reject censorship as an answer to political violence. Because censorship is the foundation of political violence, we cannot cure it with more censorship.

I disagreed with many of Kirk’s political views, but I liked some of his methods—organizing students and publicly engaging in debates on campus with critics (as he was doing when he was murdered).

As I noted back in 2017 for why colleges must recognize TPUSA chapters, “Although Professor Watchlist is morally wrong and a threat to academic freedom, that is not a good reason for a university to de-recognize a student group associated with it. Free speech applies even to those who oppose free speech. And the right of students to form organizations is an essential part of student liberty, even if that means criticizing faculty.” I wrote about those leftists who supported repression, “If you think only your political enemies will be subject to censorship by administrators, I think you are very mistaken.”

We need colleges to be safe spaces in the sense of physical safety from political violence and physical threats. We also need safety from professional retaliation, to ensure that people are not fired or silenced or punished for their beliefs. We must reject the use of repression to protect people from hearing offensive ideas, whichever side is being censored. By rejecting censorship, and making the open exchange of ideas an essential part of campus life that no violent act can take away, we can reduce the culture of political violence that endangers all of our voices.

The best tribute to Kirk would be for colleges and politicians and advocates on all sides to imitate the best of what he did—to create and approve student organizations that express controversial views and debate those who disagree, asking them to “prove me wrong.”