A partition designed by a white lawyer who never set foot in India and who spent the rest of his life feeling guilty about the line he arbitrarily drew.
I think ordinary Hindus and ordinary Muslims are fine living together. Likewise, in the West Indies, ordinary Africans, whites and Indians are fine living together. It's simpler things which cause jealousy, violence and hate. Things like land, food and money. Religion, "race" and cultural differences are just a pretext.
Indeed, in Trinidad, racial problems only started after economic gaps widened and only after big oil money started flooding into the country.
There's nothing inherently good about "integration". If people want to be by themselves, let them. If they don't want to intermarry or don't want to accept other people's customs or beliefs, let them. You can't force people to like each other. Just let things play out and be happy if and when people start trans-culturally hugging. Bland homogenity shouldn't be a goal.
But in first world nations, "integration" is really just a codeword which begs white people to accept cheap immigrant labour and which begs cheap, scapegoated, immigrant labour to be more tolerant of the angry white people whose jobs they have displaced.
In Trinidad, "integration" is just a codeword which begs everyone to turn a blind eye to economic problems and which begs everyone to occasionally vote for a party lead by a leader of the opposite "race".
It's the other way around. "Integration" doesn't bring peace to a region. Unstable regions use "lack of integration" rhetoric to distract from why regions are unstable in the first place. The word allows you to blame the victims.
You'll need to implement some new economic policies...
www.sciencedirect.com/science/article/pii/S1057521914001070
...on your magical, new United States of Africa. Otherwise you're going to start bringing in cheap Chinese and Indian workers, whom your Happy African populace will probably hate integrating with.