I'm not sure why you're interpreting that tweet as a threat to try to force HR to intimidate someone into stop having thoughts. Maybe she's saying she doesn't

I'm not sure why you're interpreting that tweet as a threat to try to force HR to intimidate someone into stop having thoughts. Maybe she's saying she doesn't want to work somewhere her teammates think she's biologically inferior, but she's hoping that HR will ensure that person doesn't stay on the team?