There’s no assuming going on. These students explicitly threatened reporting him to the Chinese government, and did so using their registered accounts in online chat so we know exactly who it was.
That's called an allegation, an assumption. And alleging students said some dumb shit is different than proving collusion with PRC gov unless Purdue can dig up files from PRC MSS. In the meantime, the parsimonious answer is kids playing with PRC cancel culture, because to my knowledge there hasn't been a single proven allegation of PRC kids directly reporting other PRC nationals on western campus. Plenty of yellow journalism alleging collusion from the last few years, but zero expulsions despite China Initiative cracking down on campus harder than ever. That should tell you something. If anything I hope Kong / Purdue hits up the proper authorities and finally get some clarity on the extends of the issue other than non-stop news cycle weasel allegations. IMO the likely outcome is dumb kids trigger cancel culture drama over social media, and again free speech =/= freedom from consequences in other jurisdictions.
Two giant paragraphs that are largely irrelevant as well as inaccurate. Purdue has a framework to work with to adjudicate situations regarding the student experience. We will see how it plays out. Your emotional response to some trigger doesn't have anything to do with what is being discussed.