There are some similarities between Jean-Paul Sartre's concept of bad faith and Karl Marx's concept of false consciousness. Both concepts deal with the idea of individuals denying their true selves and conforming to societal expectations, however they differ in their root causes and the extent to which individuals are responsible for their own self-deception. Some scholars have argued that Sartre's concept of bad faith can be seen as a response to Marx's critique of false consciousness. In bad faith, individuals deny their own freedom and responsibility, which can be seen as a response to Marx's critique of the false consciousness that arises from capitalist ideology. While Sartre's philosophy is not explicitly Marxist, his emphasis on individual responsibility and the importance of recognizing societal forces that influence behavior shares some similarities with Marxist thought.
Sartre's concept of bad faith is a state of being where individuals deceive themselves into believing that they are not responsible for their actions. Bad faith involves denying one's freedom and responsibility for their actions. Sartre argues that individuals use bad faith to avoid the anxiety and responsibility that comes with making choices. The individual is responsible for their own self-deception in bad faith, as they are the ones who choose to deny their freedom and responsibility.
On the other hand, Marx's concept of false consciousness is a result of capitalist ideology. Marx believes that the ruling class uses ideology to control the working class and maintain their power. False consciousness involves denying the true nature of one's social conditions. Unlike bad faith, false consciousness is not a choice made by the individual, but rather a product of external forces imposed upon them.
Despite these differences, both concepts emphasize the importance of individuals recognizing their true selves and the societal forces that influence their behavior. Both concepts also involve conforming to societal expectations and denying one's true self. However, the root causes of this conformity are different.