I hear about this all the time
"A recent survey of 1,000 Republican and Republican-leaning college students has found that 73 percent of them have hidden their political views in the classroom — because they’re worried that exposing them could negatively impact their grades.
College Pulse conducted the online poll at the end of August for a conservative campus-news source, The College Fix, which has previously reported on its findings. The survey polled conservative-leaning students only.
According to The Fix, the survey asked students: “Have you ever withheld your political views in class for fear that your grades would suffer?”
Seventy-three percent of students who considered themselves to have “strong Republican” views said yes, as well as 71 percent with “weak Republican” views and 70 percent of Republican-leaning independents.
The huge percentage of conservative students responding in this way is disheartening — but it’s not shocking. In my years working for National Review, I’ve covered numerous examples of professors and faculty on college campuses who have chosen to make their hatred for conservatives known. For example, earlier this year, administrators at Middlebury College apologized to students who were upset that a conservative speaker had been invited to campus and pledged to do more to prevent conservative speakers in the future. In 2017, a Clemson University professor declared in a Facebook post that “all Republicans” are “racist” and “scum.” In 2015, a journalism instructor at Mississippi State University compared a conservative student group to the KKK. Back in 2014, a University of Michigan department chairwoman published an article titled “It’s Okay To Hate Republicans...."
https://www.yahoo.com/news/poll-73-percent-republican-students-142449946.html