This chapter investigates whether the so-called 'migration crisis' of 2015 is associated with a change in welfare nationalist attitudes across 19 European countries. The chapter asks first whether the highly visible 'migration crisis' is associated with a shift in the levels of welfare nationalist attitudes among Europeans. In a technical sense, the 'crisis' is treated as a natural experiment that allows us to investigate how a salient event affects popular attitudes towards granting social rights to immigrants. Does welfare nationalism increase or decrease, or do attitudes become more polarized? The chapter then goes on to investigate whether certain contextual changes, such as the political salience of the immigration issue, the presence of inclusive immigrant integration policies, the proportion of foreign-born and asylum seekers in the population, and economic conditions help to explain within-country changes in support for the inclusion or exclusion of 'newcomers'.