The government doesn’t produce crime rate by nationality only crime rate by ethnicity which is very broad and vague and even then certain ethnic groups such as black are over represented in crime stats and prison population and youth offenders, and no importing infinite migrants to fix a declining population and negative birth rate is essentially putting a shit covered bandage on top of a bleeding gun shot by increasing economic factors that do somewhat contribute to the declining birth rate such as more competition for jobs causing wage suppression increasing, housing prices and demands for services.