I think things definitely got better in the latter parts of last century and we could discuss almost anything without repercussions but I think some taboo subjects are harder to discuss now.
Even though I don't like milos yianopolus I see him getting shut down wherever he goes. Universities in the US sometimes close for the day when he's due to speak and teachers threaten the students that if they attend his talk they will fail and other similar repercussions.
Universities should be the cutting edge of critical thinking but seeing them close off unpopular lines of thought & discussion just seems wrong to me. I say let people put their theories and beliefs on the public record and then try to fault their logic rather than shut them before they can speak.