Crime in general is a function of socioeconomic status, where migration patterns usually involves a flow of people where those who migrate has relative low socioeconomic status.

There are exception to this when people of high income, wealth, and education moves to an area where the relative socioeconomic status is lower. A typical example is popular (often warmer) tourist locations, and in those cases we don't usually see anti-immigrant views gaining popularity. Following this we could draw the conclusion that anti-immigrantion politics is simply a proxy for politics in regard to an a influx of low socioeconomic people regardless of ethnic or religious backgrounds.