It highlights that even with the police commissioner there, people can kill you for a rumour. So what is government enforcing if mob can take you apart for any

It highlights that even with the police commissioner there, people can kill you for a rumour. So what is government enforcing if mob can take you apart for any reason they want? If mob gets triggered by you criticising their cows or government (idk why blind patriotism is so widespread here), what would you do about your free speech if you get killed in the process with no enforcement against those who killed you or imagine a family member? Honestly I am confused about free speech as well. Is the argument that government didn't stop you from criticising itself, just that the mob happens to kill you for it in public in the presence of the government make sense? Is that free speech?