Schizophrenic people still have a sense of humor… To me it came off as if she recognized that the cop was afraid of her and made a snappy comeback, because it’s generally offensive to be accused of wanting to mame strangers with boiling water.
Rebuke just means to criticize, it’s not an attack, or even aggressive. To rebuke someone to God, is just saying your going to complain about their behavior to God. Tbh the moments before she was killed seem to me the most coherent and responsive she behaved during the entire encounter.