One very simple explanation might be that the rest of the students simply didn’t hold the opinions that this particular student expected/wanted them to voice.and suggests (or the writer of the article suggests) that this was due to the students being fearful of expressing unpopular opinions
A recurring theme in these “chuntering under the breath about being silenced by wokeness” things, and I sense it might even apply to this rather strange thread, is that the chunterer is burning to say something that they know will prove controversial, censors themselves because they haven’t got either the courage or the speaking skills to come out with it, then assumes that others are thinking the same thoughts as them, and being prevented from expressing them, when in fact they aren’t.
Truth is, it does take a bit of courage to come out with opinions, especially in an environment like a uni, where you’re surrounded by whip-crack smart, very articulate people, many of them at a stage in life where they haven’t had the corners worn off them by life-experience, so tend to be a bit purist/theoretical in their thinking. Another truth is that that’s part of why you go there, to expose yourself to different views/perspectives, learn how to debate both peacefully and skilfully, to have the corners knocked off your own naivety, so you can expect to get “beaten up” a bit, and if you aren’t up for taking a few flesh wounds in debate, you’re not going to do very well.
Personally, I didn’t go to uni while young and callow, and when I did go it was to study engineering, which isn’t a subject where any of this applies, but by golly did I get embroiled in some socio-political arguments at work and in my free time, and if anyone thinks political arguments are robust in a uni, they would have got a real shock arguing with a load of guys “on the tools” in 1970s South London!