The Biafra tragedy
The global interest in Biafra was related to the pictures of human misery within its enclave.
Secession was supported by some people because of ideals of national self determination and because of human rights (in the sense that people shouldn't be treated this way).
On the other hand there were extensive fears that if any people who want it can secede into their own independent state, then won't we see a collapse of world order followed by the rise of chaos accompanying the scramble to create numerous independent, micro-states?
Source: American Historical Association
Nov 30, 2016