This study explores whether a threat from an immigrant group is related to members of a dominant culture believing immigrants do not want to assimilate. As Muslim immigration to Europe has rapidly increased in the past 20 years, Muslim immigrants were used as the example of immigrants during data collection. Data were collected in France (n=162), Germany (n=111), and the United Kingdom (n=159). Threat was measured using a collection of instruments based off work in Integrated Threat Theory. Results reveal that when members of the host culture feel threatened they are more likely to believe immigrants (in this case Muslims) do not want to assimilate. There were also significant differences between the three nations in the perception of whether Muslims wanted to assimilate or not.