When a large group of people become rejected from the whole of mainstream society. They will create their own culture and society. They will reside outside the awareness of the so called good civilized people.
Within this group of rejected persons. Comes the recruiters of revolution. Offering them the gift of acceptance, sense of importance, an opportunity for change. When the hidden truth of the new amazing invitation. Is for the unwanted people to become the military force of those who desire to rule over all. They will become the useful idiots. Those who easily believe the spoken words of any charismatic person without knowing how to critically or logically question another mans words.
For a short time they will be lifted up, built up and trained how the rulers want them to think and react. A mindless and perpetually angry force of unwanted societal rejects. Another truth is those rulers of revolution don't even think of their recruited rejects as people with conscious. They are just tools like any other to be used. This is another form of slavery. Slavery by coercion.