Never pull a weapon unless you’re going to shoot ! Brandishing a weapon will end badly every time. Never threaten , escalate , or instigate. If you’re in a life threatening situation then pull and shoot without any pause. I’ll repeat , never brandish your weapon and threaten.
I would say being pregnant and threatened by a large racist black woman would constitute a threat to mom and baby. If mom would have waited until assaulted it may have been too late