I think we can see it as two big causes....It was the italian strategy for the second italo ethiopian war to divide n conquer.The stuff they did for the 5 years and after. The British,America,russia influences over the next years.The religious and the cultural values that were developed for thousands of years also made the foreign countries to cripple Ethiopia and steal what they can.the second generation(after the 1960s) started making values of foreign countries bigger than the country's in the pplz mind.The e.p.r.d.f regime cultivated on racial and religious differences to stay in power resulting a third generation that cant possibly know the OLD version but belive the version given by the broken system or Globalization.