In our fast and consumerist digital way of life, we have forgotten how important it is to disagree. When we look at the world through the lenses of our mobile applications and social media, we only see a fictional image reflecting what we want to hear and to see. Cass Sunstein extensively analyzed this dangerous vicious circle in which people socialize and interact virtually with people that have similar thoughts and tastes, while sharply opposing anyone different. This widely debated and studied phenomenon of polarization is very much related to the contemporary tragic event of the terrorist attack on the French history and geography teacher, Samuel Paty in front of a school in the Parisian suburb of Conflans-Sainte-Honorine.