The specific way you phrased that question makes me suspect you misinterpreted this as a banning of speech. Not at all. They're removing a class of required question from application forms. “The MIT administration has advised the departments that were requiring DEI statements to stop requiring them and to stop using this kind of information. This has just recently been disclosed to the faculty, but a general announcement to the students is not planned.”

Or are you asking what a DEI statement is in academia? https://en.wikipedia.org/wiki/Diversity,_equity,_and_inclusi...