Because she wasn't an idiot, pacifist, cowardly, false-Christian. Jesus never said let other people kill you or injure you without fighting back.
There seems to be a fundamental misunderstanding of some Biblical teachings.
The right of self defense is inherent in the Bible as is the right to kill someone to prevent an innocent person from being killed.
We are told in the 10 Commandments not to murder (often mistranslated as kill). Nowhere does it say that we cannot protect ourselves. Even the 12 Apostles armed themselves with a sword (presumably bought with contributions made to them).