No one makes sounds decisions when they are afraid of dying. We go through a lot of training to prepare for that moment, and even then, a lot of people fuck it up and die. That woman had a right to protest. Training for a minimum of one year before entering a combat zone should not be a prerequisite for a citizen protesting.
That said, she was partially murdered by her "wife," who goaded the officer. She should stand trial too, though I don't think she should be judged in the same way as the officer who responded to her by moving his phone to his other hand, pulling his weapon and executing the woman out of spite.
Look, I don't like leftists, either. Let's move past that. They can be stupid, we can call them stupid, but murder isn't acceptable.