Obviously the knife wielder had to be sacked.
Of course the transgender person should have made a proper complaint against the coworker much earlier. I have little time for pronoun nonsense but if one employee of that shop was deliberately and repeatedly being mean then that should be an HR issue.
I've worked in places where a bully has deliberately used the wrong name for a person all the damn time: like calling Jason James just to be a dick. It is not OK.
Of course, if the person genuinely is making mistakes not being a dick then a little bit of compassion for each other would go a long way.
There simply isn't enough information to know if this was bullying or snowflake-ism. Then again, there was no prior complaint and a harrasment order was granted.
I think HR did OK on this one. Sad situation, handles properly by courts (the order) and HR (the sacking). The HR article seems quite sensible to me.