AITA for "allowing" a child to get bullied?

My daughter is 15 and she's a lesbian. She posted a picture with her girlfriend on Facebook and some other girl from her school commented "You dyke's are going to hell." My daughter is very sweet and never does anything to anyone. She also has a LOT of friends. So over 10 kids were responding to that comment calling that girl out. I received a message on Facebook from the mom saying that I need to tell these kids to stop. That multiple people have messaged her daughter being mean. I said contact those kids people's. I'm not responsible for what other kids decide to do. She told me my daughter's post sparked it though and how "woke" people don't understand freedom of speech. I replied freedom of speech isn't freedom of consequence. Like her daughter has the legal right to he hateful. Others have the legal right to respond. I have nothing to do with what other people are saying. And I blocked the mom because she said I'm encouraging her daughter to be bullied over her religion. I wasn't responding anymore. How is her daughter for no reason coming on my daughters Facebook to bully ok but now that she knows my daughter is well loved and people came to her defense she's mad? I don't think it's my responsibility to get other kids to stop.