A 2015 study looked at bullying in the United States:

"The findings suggested that Caucasian middle school students experience more bullying than African American students generally, and specifically when minorities in school settings." These ethnic differences in school bullying are also confirmed in the UK:

All other ethnicities are less likely to be bullied than whites, and almost all are more likely to be bullies.

A Danish study on the “welfare magnet” has proved that there is a direct link between welfare provision in a country and immigration.

The more a country is willing to distribute welfare benefits, the more it attracts migrants who want to benefit from them.
"I did not need a study to know that"

Yeah, me neither, but you will when you will debate with a leftist