I did a little reading on it, and it seems that the socialist perspective is that the British assisted the Nigerians in blockading Biafra after an anti-Igbo progrom was carried out by the north? Britain's main concern was oil exports for BP.

As for Biafra, it seems like a handful of military generals and rich elites decided to start the whole thing after using ethnic and religious conflict as a casus belli to secede.

Huge clusterfuck. If you have any better info hit me up