 Immigrants (and cross-border movements in general) can bring infectious diseases uncommon to the native population from their home countries which some perceive as a threat of significance in opposition to immigration.Some point out that this threat is often overstated by opponents and there is a significant history of this argument being used by white supremacist groups in an embellished manner.Opponents of immigration often claim that immigrants contribute to higher crime rates, but research suggests that people tend to overestimate the relationship between immigration and criminality.