Additional data point related to Japan: multiple studies have shown that foreigners in Japan commit less crimes than the Japanese do*. In contrast to what the majority of the Japanese believe.Actually it is a myth that most immigrants are the scum of the earth, or "bad hombres". You should Google this for confirmation: By almost every measure the average immigrant to the USA outperforms the average USA citizen. The average immigrant is better educated, more likely to be employed, earn more, and less likely to commit crimes. 40% of major companies were created by immigrants, and almost all advanced STEM degrees goes to immigrants. The same applies to the children of immigrants. However, by the 3rd generation the outperformance disappears.
* The raw data shows a higher percentage, but that includes cases of visa overstayers (a crime which the Japanese can't do in Japan). If this category is removed, is the crime rate among foreigners in Japan lower than the crime rate of the Japanese.