I can’t see the original comment, but this response seems really disconnected from what most people mean by “trans rights”.
The original comment emphasized the need to say “trans rights” to show that people should have “rights to do what the fuck they want to do”. This is why I picked murder as an example.
In my experience, “trans rights” typically refers to a constellation of rights like:
the right to self-determination of your gender
the right to express and be recognized as your choice of gender
the right to public accommodation in accordance with your gender
the right to be free from discrimination based on your gender (including discrimination based on being transgender)
The original comment emphasized the need to say “trans rights” to show that people should have “rights to do what the fuck they want to do”. This is why I picked murder as an example.
These are pretty vague, especially the first ones. Consider e.g. Zack’s Reply to Ozymandias on Fully Consensual Gender.