This thesis delves into the ways political actors, media outlets, and individuals utilize social media platforms such as Facebook and Twitter to disseminate false information and galvanize extremist movements in the United States. It presents a historical overview of news media and examines theories which posit that these phenomena are connected to broader issues prevalent in contemporary capitalist societies. Through the analysis of high-profile events like the birther conspiracy, pizzagate, and Russian interference, this research highlights how social media and alternative media generate conflicting political narratives and mobilize communities, culminating in substantial white nationalist rallies.