As a trans person, I appreciate the concern, but no, a joke like this does not detract from the serious harm she does, it highlights it, as the other commenter mentioned

It's a joke around her hate making fun of her, and it's a joke that often circulates in exactly the circles of the groups she directs hate at

Ridiculing the evil people do might not fix the problem, but it at least shows a signal that it's bad and maybe helps create a bit of a culture of shame around being hateful. It should be embarrassing to be a hateful person