There are also cultural differences, I would bet they have different mindsets of 'grievance' vs 'opportunity' towards the USA
It would also be hard to not be affected by selection effects, eg compare Obama's dad who came to America for an economics PhD at Harvard vs someone whose ancestors were enslaved for hundreds of years
It would also be hard to not be affected by selection effects, eg compare Obama's dad who came to America for an economics PhD at Harvard vs someone whose ancestors were enslaved for hundreds of years