Hey i just got back from an internship at egypt and let me tell you all some stuff i encountered while i was?

Their i lived in downtown cairo and as i waled down the street Egyptians would always throw racist slurs at me like Samara ya Aswad! Go back to your country etc... ive studied in alot of places through out europe and it really shocks me to find out that egypt is the most racist! Why is this? i was hoping egyptians would be friendly because they live in africa!