I just added this to the new version of my book ‘Capital vs Subjectivity: A Žižekian Critique of Nick Land’. Soon.

What makes Žižek's theory of ideology so original and insightful is how it explains the function of jouissance within ideological systems. Typically, ideology is thought of as false consciousness, which means that ideology can be fought with knowledge-based critique. If ideology is simply a matter of misconceptualization, then explaining the truth of the situation with the ideological subject ought to be enough to free him or her from it. However, this is not how ideology really works. What we find is that people tend to have stubborn attachments to their ideologies. The reason for this being that human beings are not merely duped by ideology but, more importantly, they enjoy it. This is why Žižek holds that we must go beyond the ideological symptom (meaning) in order to arrive at the ideological sinthome (jouissance) if we are to reach the hard kernel of an ideology. The idea is that every ideology superegoically authorizes its subjects to partake of some form of obscene enjoyment that comes to be the libidinal center of gravity of their lives. If you say to the ideological subject, "Hey, you need to let go of your ideology, since it makes you do things that act against your own self-interest", then the ideological subject will likely respond, "I'll give you my ideological enjoyment when you pry it from my cold, dead hands — give me ideological enjoyment or give me death!" And this is reinforced by the authoritative injunction of the superego. "Enjoy! most fundamentally means "Enjoy your ideology!"