Faith, fury and fear: The story behind one of history's greatest mass migrations
http://edition.cnn.com/2017/08/08/asia/india-pakistan-independence-timeline/index.html
To avoid oppression against different religionists, people in India and Pakistan tried to live separately.
On the other hand, in Singapore, immigrants are forced to live in specific area to keep racial diversity in each area. It aims to remove racial or religious prejudice by interacting with neighbors.
I wonder why Singapore's policy couldn't be effective in India and Pakistan.