We kicked out a bunch of traitors from Congress during the Civil War era, so banning a person from twitter who is actively trying to foster a Civil War by promoting lies and misinformation seems pretty mild.

Banning her or anyone like her who spreads lies is perfectly within Twitter's terms of service. The issues is doing it consistently.

I can't tell you how many times I have reported lies about elections and Covid on twitter and almost always it's "We found nothing wrong with this".