The answer is easy. Authoritarian is not Nationalist. We believe that the old world of separate countries and communities was a safeguard of democracy. This entire movement of migration and internationalization has only one goal, creating a pulverized society where people don't know each other, don't have an identity and cannot understand each other. This is the key to render democracy impossible. So
we don't want a strong dictatorship but an homogeneous society where people agree on what they want. All the rest is garbage and chaos