Undereducated blacks are all in for the race war. They’ve been saturated with the message that they are victims, whites are the evil oppressors, and violence is the only way to address their situation.
There is no way this ends well.
The danger is not a civil war in the USA. That could be settled by evolution or peaceful revolution, and warfare could be avoided.
The danger is foreign interference. Having foreign nations and foreign participants enter a conflict within the USA would be a serious danger and an invitation to a nuclear World War III. That MUST be avoided.