Whether what you said is true or not, I can't judge without seeing it with my own eyes. But from a legal point of view, this slogan is obviously problematic. Its content mainly involves the standard of self-defense and cannot be explained by a simple slogan. Because self-defense is more responsible, I won't go into details. To put it simply: in the process of preventing criminals from committing crimes, if criminals have stopped committing crimes, then killing them by violence is excessive defense and even murder.