It might be anti-both. If you insinuate that everyone of gender 1 is liable to become a genocidal dictator, that’s an insult to people of gender 1. If you insinuate that no one of gender 2 is liable to do anything substantial, that’s an insult to people of gender 2. Neither insult ceases to be insulting merely because you said something bad about the other people too.
It might be anti-both. If you insinuate that everyone of gender 1 is liable to become a genocidal dictator, that’s an insult to people of gender 1. If you insinuate that no one of gender 2 is liable to do anything substantial, that’s an insult to people of gender 2. Neither insult ceases to be insulting merely because you said something bad about the other people too.