You don't sound very bright. That can't be an argument for Asians being more diverse. Africans can resort to same argument - no Somali will agree he's the same as Nigerian, and no Nubian will agree he's the same as a Congolese.
Africa is the cradle of humanity, and we non-Africans are a subset of African diversity. The fact that we descend from a small group that left Africa only 50k years ago is a well established theory in the scientific community.
I never claimed they are the same. But the differences between a Somali and a Nigerian are much less so than say an Indonesian and a Sri Lankan.
Europeans on the other hand are binded by common linguistics, religious history, racial/subracial composition, cultural history etc.
Europeans are majority Christian. Muslim Bosnians & Albanians still share common linguistics & genetics with other Europeans. They're also Caucasoid.
Asians do not have such level of similarities. Even Japanese and Koreans are distinct linguistically, sub-racially, religious history etc.
They don't really have a concept of commonality like Europeans do.
Even the pre-Christian religions of Europeans have similarity dating back to the Proto-Eurasian religion. Finns, Hungarians & Estonians are still Caucasoid, Christian and culturally European.
The current folklore of Europeans is also similar. Same origins.
Africa is far more diverse than that and Asia is even more diverse. African Union is more of a vague co-operation just like Islamic co-operation council.
It cannot be compared to the Arab League or the GCC countries. On the mention, I think GCC countries are the closest comparison to the European Union.
Countries consisting of a common Arab racial population. Same language. In fact same variety of Arabic. Same religion.
And GCC countries have made good progress and co-operation.