Yep, she is correct on duty to protect. Moral obligations are different than legal obligations though.
The thing about many (at least the one I followed) of those cases is they sued because they refused to take any action to protect themselves. One was offered a hotel where hee ex wouldn't know she was until they found him and took him into custody. But it wasn't convenient. She wanted a cop stationed at her house.
They only thing she is wrong on is qualified immunity. Its not blanket immunity. More often than not its for times when something occurs and wasn't already covered by established law or case law.
I spent a fair amount of time in the ER and having surgery due to putting myself in danger and getting hurt to protect someone else from getting killed.
