We should celebrate non-Africans winning because it's a sign that the doping mess in Africa is getting sorted and it also disproves the racist theory that Africans are genetically better runners (something that discourages and demoralizes young non-African runners).
"racist theory" ? What a nonsense. "Africans" are either genetically better suited for distance running or not. Many reasons lead to the first conclusion, it has nothing to do with racism. If it demoralizes young non-Africans? Might be true - and now?