BY CAITLIN CHANDLER AND EBBA ABBAMURTI | Okayafrica Tariku Debela, in jeans, walks carefully through the streets of Eastleigh, Nairobi. Photo by Ebba Abbamurti. On a warm evening last month, Tariku Debela was walking home from dinner in the immigrant enclave of Eastleigh, Nairobi, when he was jumped by four men who took his phone and more than $200…