White flight from urban cities.it’s not just in america it’s happening in canada to,england,france,germany, all over the west and a lot of research has been done on this.look at london it has a crime rate higher then NY, and it’s all knife crime and acid attacks and other things like that. london is the acid attack capital out side the middle east. france 2 american white girls went to france for school and were sitting on a bench and some black guy splashed acid in there faces.paris is well known for begging a shit hole at this point.