If crimes are being committed disproportionately by expats, we should look at the economic situation of those committing crimes vs other demographics, as there is a large crossover.
So that leads us to the question, is it expats commuting more crime or is it poor people committing more crime as expats are generally also in the poorest section of a society.
Sweden has amongst the most generous welfare systems in Europe and the world. If higher crime rates amongst migrants was caused by economic poverty, Sweden should have lower crime rates in these groups than other countries. However, this does not seem to be the case.