Why do brothers become enemies?
Why do the best lovers hate?
Why do the best matches clash?
It has to do something with the law of nature.
Law of attraction and its law of nuclear forces
which bind two nuclei but when the nuclei come
too close a force starts working which is repulsive. so its not strange that two people who once loved the most don't see , don't talk to each other. on the contrary they love the once strangers at the same time suffering the pain of separation from loved one.