Twitter has a Terms of Service which you agree to when you sign up, she broke those many, many times.
help.twitter.com/en/rules-and-policies/hateful-conduct-policy
You may not promote violence against or directly attack or threaten other people on the basis of race, ethnicity, national origin, caste, sexual orientation, gender, gender identity, religious affiliation, age, disability, or serious disease. We also do not allow accounts whose primary purpose is inciting harm towards others on the basis of these categories.
We prohibit targeting individuals with content intended to incite fear or spread fearful stereotypes about a protected category, including asserting that members of a protected category are more likely to take part in dangerous or illegal activities, e.g., “all [religious group] are terrorists”.