The radicalism that instills ideas of violence is the embryo of the birth of terrorism. Radicalism is an attitude that wants total change and is revolutionary by overturning existing values drastically through violence and extreme actions. The main obstacle, namely overcoming radicalism through social media, is regulation. Radicalism through social media is only carried out through takedown action, this is certainly not a solution, because of the nature of social media, once a takedown is done, it will appear again. Therefore, determining to regulate radicalism in an offense needs to be done. The state must not lose to radicalism and terrorism. This is because the state is the main protector of people's safety. Therefore, to protect the safety of society from radicalism and terrorism, the state has the authority to establish a law that can tackle the spread of radicalism as a small matter so that it does not grow.