There is a programme on Ch4 tonight at 10.00 called Gender Wars, which is going to discuss issues such as this.
The summary says:
Sex and gender are at the heart of one of the most polarising issues of our times. With views from various sides of the debate, is there an end in sight to the conflict?
I don't know how much depth it will go into, but I will definitely be watching.
Anyway, I don't think that hate speech is subjective at all. We have laws which protect 'protected groups', and that includes transpeople, who are not as marginalised as we keep hearing.
It is against the law to incite racial hatred, or to commit a criminal offence which is perceived by the victim or any other person, to be motivated by hostility or prejudice, based on a person's disability or perceived disability; race or perceived race; or religion or perceived religion; or sexual orientation or perceived sexual orientation or transgender identity or perceived transgender identity, as those things would be considered a hate crime.
Simply saying that males can't be women is not hate speech - in fact it is now a protected belief. I think it is a sad reflection on our times that people cannot bear to hear criticism of their prejudices and want to silence others, to the point where a debating society refuses to allow debate in one of the most prestigious universities in the land. Robust debate is an essential requirement for a decent education, and actions like this one deny that opportunity to those who want to benefit from it.