Croatia is facing a growing refugee population and various challenges related to their integration into society because of one of the biggest humanitarian problems in recent history. Unlike the countries of Western Europe, Croatia has a transit role for most refugees, and few choose it as their country of destination. Nonetheless, the presence of a refugee population among a part of the majority population raises concerns. The goal of this study was to contribute to the knowledge about Croatian citizens' attitudes towards multiculturalism by examining the contribution of dispositional characteristics (right-wing authoritarianism - RWA and orientation to social domination - SDO) and dimensions of national identity (blind and constructive patriotism) as well as a perceived intergroup threat in predicting the attitudes toward multiculturalism. Additionally, the mediating role of the perceived realistic and symbolic threat in the relationship between blind patriotism and multiculturalism was examined. Data were collected online, on a convenient sample of 677 participants. The results showed a significant contribution of right-wing authoritarianism, orientation to social domination, and blind patriotism in accepting the ideology of multiculturalism. Constructive patriotism has not proved to be a significant predictor of attitudes towards multiculturalism. Intergroup threat partially mediates the relationship between blind patriotism, as well as SDO, and acceptance of multiculturalism. Perception of threat completely mediates the relationship between RWA and multiculturalism. In line with the results, activities aimed at increasing the acceptance of multiculturalism are suggested.