Most often in those videos they are spazzing out. They've reached their breaking point aka nigger exhaustion. They're not in control of their emotions and behaviors any longer. Their anger is justified but the uncontrolled outburst is bad optics because it can be compared to a nigger chimping out. They feel vindicated in their actions because they are, but their reaction is out of proportion to the individual offense. Can't lynch every nigger who looks at you crossways.