ok so first you have an article from last year about conservative students complaining about comments made by a professor during her class. This a complaint about how she is doing her job, not a free speech issue.
Then second you have a site, whose only obvious dating seems to be for 2016, that identifies faculty and their political leanings. If faculty make political comments it is only fair that those comments are available for all to see. That is hardly an attempt to stifle free speech.
And neither would represent your claim of:
"It's not only the left who impinge on academic freedom although they attempt to block campus speakers twice as often as the right."
You have completely failed to come up with any right wing attempts in April to match what the left was doing and so have failed to prove your assertion