Class Warfare - Nobody Got Rich on Their Own

When the [Chinese] Cultural Revolution began in 1966 (a movement to sweep away all the evils of the old class system), in many areas the descendants of the landowning class were buried alive, even though most of the landowners themselves were already dead. No one was spared: neither the old nor the young, nor even the women and children. People said, just as there is no love without cause, so there is no hatred without reason. 

Where did this spirit of enmity towards the children of the landowning class come from?

It came from the fervent belief that those descendants of the landed class had relied upon exploitation to create their place int the world." - Mao Yushi