Religion is the classical object of toleration. Liberalism developed as toleration and rights protection of religious differences. More recently, religion – and more specifically, Islam and Muslims – has returned to the political agenda as part of processes of securitisation, where religion has been framed as a threat requiring extraordinary political measures. The chapter examines what securitisation of religion implies for religious toleration. It argues that securitisation affects the scope of toleration but also threatens to undermine the very meaning and function of toleration.