If you adjust for socio-economic factors then migrants are just as criminal as the rest of the population.
https://nos.nl/artikel/2621324-percentage-asielmigranten-ver...
https://nos.nl/artikel/2621324-percentage-asielmigranten-ver...
It's very useful to have a disenfranchised underclass of immigrants to keep your own working class in check. Bonus points if you convince the latter that the source of all evil is the former.
101 capitalism, and it has worked with you.