Welcoming newcomers does not increase crime in Canada

In fact, the opposite is true: 

On the fasle link between immigrants and crime - FCormier quote

Some researchers even suggest that welcoming newcomers can actually lower the violent crime rate. In the most recent Statistics Canada data available, the percentage of recent immigrants in various regions of Toronto and Montreal is inversely proportional to all types of violent crime, acting as a 'protective factor' - a buffer against crime.