In recent years, mobilisation along the cultural dimension intensified in East-Central Europe. Conservative groups, the Catholic Church and the radical right, as well as radicalised mainstream politicians, are increasingly adopting the populist socially conservative rhetoric, blocking pro-universal rights legislation and running electoral campaigns on the rollback of universal rights. These dynamics are an integral part of the illiberal backlash which centres around the notion of sovereignty. It rejects demands for universal rights as foreign-forced on the country by the EU or CoE. Using historical institutionalism to compare domestic processes around minority rights in the Czech Republic and Slovakia, this chapter shows that the mechanics of the EU member states’ backlash against minority accommodation can be mainly attributed to the domestic actors. As a result of different domestic configurations, some European norms take root, while in other cases, domestic actors seek to prevent accommodation and rollback rights.