Orwell knew…. Hatred is a control mechanism.
The more repressed a society the more hateful all within must be. In order for oligarchical collectivism to take hold – in order for the few to benefit over the many without recognition or revolution – hatred must be infused. Hatred leads to the “us and them” mentality which drives clever reasoning to convince people to kill and be killed in the name of an institutional godhead. The more repressive and evil an institution, the more hatred they will drive and instill.