Freedom of expression doesn't equal freedom of aggression.
If Chris touched the person that was interfering in his conversation (exercising his freedom of expression) with another person, it's because the police person who should have stepped in, stood there watching.
In the end, the trans person and the police person are actually reinforcing the prejudice and intolerance toward trans people, and the lack of trust in the police, by acting as if they are above the law.
After a similar thing happened to me, I now avoid both. I'm not intolerant, I'm afraid of them. Is it prejudice? Probably, because I know that not all trans people and police people are like that, but fear is stronger than anything else, particularly if you are an autistic person like me.
I might not agree with Chris but I defend his right to speak without being harassed and bullied.