Was the ideological Cold War necessary

Yes it was because it had a cause and a effect!

Explanation:

The Cold War originated from ideological differences. While communist nations and industrialized capitalist nations competed in both technological and political superiority, both nationalistic tones appeared, creating differences leading to the brink of a war without combat.

pan-africanism or pan-africanism is a political, philosophical, cultural and social movement that promotes african twinning, the defense of the rights of african people and the unity of africa under a single sovereign state, for all africans, both africa as of the african diasporas.

me on my last question.