Because some student demonstrations protesting his scheduled appearance have resulted in violence, the president of the Imperialist Society has been prevented from speaking about politics on campus by the dean of student affairs.
Evidence
The dean prevented someone from speaking about politics on campus.
Denying anyone the unrestricted freedom to speak is to threaten everyone's right to free expression.
Conclusion
The dean's decision has threatened everyone's right to free expression.
Evaluate
Wow, campuses as safe spaces from controversial speakers? On Test 18? This is like pre-Internet era. I'm surprised this was even a thing they would think of back then. Anyway ...
The most important logical feature of this argument is that the second to last sentence provides a Conditional Rule:
if deny unrestricted → threaten everyone's freedom to speak right to free speech
We get a fact that triggers the rule (the dean restricted someone's right to speak), and then we get a conclusion that says the outcome of the rule (the dean threatened everyone's right to free speech).
Goal
Let's look for an argument with 1 conditional premise ... X → Y 1 factual premise ... X happened. 1 factual conclusion ... Y happened.