Huh? That not everyone agrees doesn't mean nobody believed her. The highest-voted reply complains about censorship. The second-highest talks about the police acting in self-defense. The third-highest fantasizes about shooting ... someone (I initially interpreted it to mean the police, but maybe they actually want to shoot the protesters?)

No, the third one says, if the police really could shoot, why did so many other events [that she mentioned] also happen?

Implying that she lied.

Makes sense, thanks. I still frequently misread Chinese texts that appear completely obvious with hindsight.