Trust has to be re-established to make sure people can keep on learning. If students feel disregarded, their voices are silenced in the classroom. This comes down to respect. A good teacher thinks about and validates students' contributions to debate. This puts professors in difficult positions.
Every classroom has certain norms of discourse.
For instance, professors are no longer free to make comments about women's breasts. Some speech has no cognitive value. It doesn't advance discussion. I would to see a norm against speech that silences others. My freedom to articulate my point of view doesn't free me from others' criticism.